Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8aa0206d33e674c…

MALICIOUS

PDF

91.2 KB Created: 2021-09-04 19:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f1eb02108845441c2e41889248db3124 SHA-1: 7b02ac828863b7c579e9247fc3ec8d487881da6b SHA-256: d8aa0206d33e674c9771bd8cbc19e6c3b4fd327d1857edfcce1eeab909c0ca27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to numerous external websites. Several of these links point to compromised WordPress upload directories, indicating a potential distribution point for further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://ibb-online.ru/f/file/15462203601.pdf In PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/gavoratavu.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/noxidovaposigigasilonej.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/zuvuv.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608477df5611f---radogitidewovometox.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd789bf0b---24649883674.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/08-26-21-20-28-15.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/p5pkl75g97lsqpqgv22ic9f33p/fukozugizagivakupo.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2583e9606a7fc3af24c06784d1395215/82772634224.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161199250a01ee---59114241669.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/rufolafuxinunebakujukepu.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e93b13127---59983200079.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/93854282135.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/zizemezovakitoxogemu.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160902371c37e2---7655589159.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/kofuniwarinevazedelerimi.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/591b0fcfc15f757b7b09409a8141f912/tarodifutofegegagatalu.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/nixafetenutaveworakavuzek.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160848d17bf4dc---boxowulozaxeri.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/zijeli.pdfIn PDF document text
    • https://ienter.bg/files/xuzulanurupijevuxidumexom.pdfIn PDF document text
    • http://harveyfamily4016.com/clients/5/51/51a16c7d09a65bdad6d3cd8ef7da6b4e/File/77901927967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=egyptian+and+nubian+empires+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 11012 bytes
SHA-256: 5da0250d848ec7f347da766b7dbfd91dedcc7603b06829bb57cd0844e9bb2aee
font_01_sfnt_off0001190d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190D 18188 bytes
SHA-256: 26abb8f7bdb0c71d6a4cef9a556bb432c163706b928cffe296c02cb966dade92
font_02_sfnt_off00014733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14733 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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