Malicious PDF — malware analysis report

Static analysis result for SHA-256 6902bd12f0067286…

MALICIOUS

PDF

86.4 KB Created: 2021-07-22 05:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0f144171a856a661a8c4ceca1f23a6cc SHA-1: 154e21c90743d784958862a0a8252bf3157e4572 SHA-256: 6902bd12f00672865759b9af410d8e8436add43b57f9a17b5f6e74392d82a90d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple external URLs, many of which are hosted on compromised CMS platforms. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The document body is unreadable, but the structure and URL analysis suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070fa13dd14f---9819883248.pdf In PDF document text
    • http://bsbcarpet.com/userfiles/file/17334998355.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202178163010.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6799938f98a830ab5d0856ea3ccbfb1e/93515560393.pdfIn PDF document text
    • http://446888.top/userfiles/file/lemopuruja.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a98c75e2c74---68357232825.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/56e99301f1ab758efe1091bcfe21f50c/kalijavatisod.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b78a7f631---wevemoruremeges.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/875565bd2874abd4e8ece0db1ba0bcaa/35522542012.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97565c159---75996714644.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/78028117405.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607570286fbf7---35162096040.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/xitof.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d2682a468248f775a0448f3883968a6/59986041437.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861f7385ba1---52586715424.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a8cf3f793---wuzununolozadokevetutebis.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/98df1a2c83f3c1cb776ae6c3edc71204/jedorujewiwatasemonu.pdfIn PDF document text
    • http://francisfamilyreunion.net/clients/870293/File/66018770578.pdfIn PDF document text
    • http://betamarin.com/images/media/files/wanizomuluvetomopozufon.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/luwuzateb.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/aolbgdrn3j506fem8pmvie6nag/72189164530.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8df367656---jedodazulobakebibapuvom.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1626883555.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/340b5d7e47f3483859d08aec30e5948c/77973196052.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/85575002329.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=east+africa+bottling+share+company+vacancy+2020PDF 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_off0000ead3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 11472 bytes
SHA-256: 1ac96a6524a19e0109a4d5279b760e1ee6e4f8af0dbf9319dff6930c0c073547
font_01_sfnt_off000105a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 18052 bytes
SHA-256: 2ea371bef3d2294cc36604ccf9eecafe2c661e67df41f5312f059c8cea7d5391
font_02_sfnt_off0001340b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1