Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6623a20db233005…

MALICIOUS

PDF

92.9 KB Created: 2021-07-02 22:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a7f7f61e5d267e95cc4e09af94bf34e0 SHA-1: 236e1c49740fd1e13523460502dd39a2f9e58b26 SHA-256: d6623a20db233005d8efc55de4c76cb7b0bc7ae72c260f4deda52885c333948e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to compromised WordPress sites. The heuristic PDF_RANDOM_URL_LINK specifically highlights a link to a PDF hosted on a compromised WordPress upload directory, suggesting a potential download or redirection to malicious content. No scripts were extracted, but the extensive use of suspicious URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/1a48dc2749c5b78ed4d2f0bda5a7043e/xafadomuxupubiji.pdf In PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/2d6813bb78c9454301c64b228fdb50f9/natelojozarozex.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/fimabatogusoxunab.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/c7f02fe441e15dbc26d91261e138c100/sipekijinamakigow.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/37855486841.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210630015132.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ba9786581---bosimeno.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/34441295531.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/03f5535a17f259bb33adcd83c575f645/duximubusoduvunug.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086eb625a582---14148790601.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867fcbcb571---65215300891.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/addf36b805647cbfe50626922b3def48/47837659795.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/0615f95d7404f962d30f9080e549e374/fupojow.pdfIn PDF document text
    • https://service-panev.com/userfiles/611539943.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/baqecg50af69bs8m27lqu54oat/vegexigosivopimezudaz.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873ca544f15---xemebuxuvomudoveg.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/95465420122.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/09e2806362a2330f1ca0e087f7893ca4/53132444789.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/30937316714.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/18be5f6c8b132e65d1fac6ace3e4fe78/fosewifaniriwokigasitaxu.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae87888cb65---farosiwobaropojoroma.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/pepufiw.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c771d0cdbf---23493498499.pdfIn PDF document text
    • http://waltwhitmanhsclassof1970.com/clients/3/38/385e9ad2c098ba3bcab8db81b262ab1e/File/vosajukubuvakiso.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/29091986356.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c050d5d1541---sapixonimefubosuseruge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=drawl+meaning+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10361 19412 bytes
SHA-256: f70954749659f316abf7ab2efe58d2cac5f0a5eb9974d6b657353cc48f9500d8
font_01_sfnt_off000136eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F02 10424 bytes
SHA-256: ff782ee2d71928e279ded9c2272e5b31b8a2e3dd3784be266150752fa5cf73c5

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