Malicious PDF — malware analysis report

Static analysis result for SHA-256 0568e0f57b37d075…

MALICIOUS

PDF

101.0 KB Created: 2021-06-29 22:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 01b6ed8aabcbdef56a0ebae2ca318ab1 SHA-1: 2bc1e2575568ebe87cf02e2c0815f4615f4c040e SHA-256: 0568e0f57b37d07509ac7a40c2d377114b5b9c4f177db51a3e918b53fad03612
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dostavkaturov.ru/files/file/pogomijerogiw.pdf In PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/80f48fe4292c6ff063cb0c69f624dd3b/nokigujebawurumoxezatuli.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/faf1d9ab18899d5629c09ad848786960/37859113393.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4214506a8---74735785078.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/a652b773b3cdaef2aa36697c610f5c52/88908546365.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eadd525737---14459978750.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/16hmpcssjpcmg9h749q8h7pn88/95285259361.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/25206063007.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ig029pq63h0uthps6d7oeub82m/nanetamaduboli.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895f03447a7---68973365330.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/59909766651.pdfIn PDF document text
    • http://iwishop.hu/file/kiduzuxavujawejemevomefas.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/10633986746.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d0808643c---34136387470.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/40384533300.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c401354bc---76283772073.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a1028977fef19a3526026f6d10a5416a/57347477539.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a164b1e8a45---20775074335.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e4ce52cff5316c5290b85e95c9812de3/baxekubexovaja.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bc4b529d1---bidixejirim.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/96f3b892de3c45a5b321a6aa9e32b158/66443682326.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/27404712572.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/60051647527.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/eeb84167efff55ed1ab77fe6821d9b97/50792936213.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/12vko6km7snqnapa7c9e2fghd6/48126044260.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/669d81077cb9ddc4caa15269e15d72ee/deviz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=it+is+with+sadness+resignation+letter+samplePDF 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_off000128c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C5 17208 bytes
SHA-256: 00b2c4d87eb645e9c38871ee04adf69f6c9c8101b77b1be011421a5ba164f663
font_01_sfnt_off0001559d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1559D 10876 bytes
SHA-256: 44070554e5a8e8b5b9bec7c13c4beb181ba0fee0f82f5b055906a523ad196277
font_02_sfnt_off00016e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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