Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8aca65792d92cb6…

MALICIOUS

PDF

87.0 KB Created: 2021-06-29 16:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b2dbfa04e12fbe64a7ba74594203a9f1 SHA-1: 832a141f130256b3f5d79ccbdc2d9d9ade3d4b74 SHA-256: c8aca65792d92cb6424fb6ca9232bf6303d5bd7446f4a56bf1c7c44eb8f80487
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40ff3cc7b9---46762965793.pdf In PDF document text
    • http://tnslib.net/userfiles/files/xujofuginidomoj.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7f5e0689e983778164192372cc0163c7/bimurowofikoxaketi.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/7212703259.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/66302624365.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd1421253c---mepofixumifofepeg.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/49eaccd811513b710ac91321d6bcc90a/wijelekotiga.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/jilix.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075952c52452---70367664465.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/9ece6ad7defd4cee6befa11ac92980eb/36691639292.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/97899824643.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/luvorarepusonapob.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098673c9e4d0---82383431741.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160878cd30addf---kakujusibu.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/vimoxefubaveborowaked.pdfIn PDF document text
    • http://garderoba.sk/images/_file/xogipaburonurebureruk.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607432a532c48---ruvewurogobakiwapivam.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/84171861863.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160799f2032652---fezemetitofi.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/ce13795358219a3de0ec021c29f5b40f/86902798949.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be455b3a87---93608212058.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/101850283296.pdfIn PDF document text
    • https://soechi.net/userfiles/file/80955368208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+answer+what+your+weaknesses+arePDF 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_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 10448 bytes
SHA-256: c7c96ad4833a5000f8c3aed84bca9705d10aa8fb16023cbf3ef9580a1a7f4fae
font_01_sfnt_off00010906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10906 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12118 17556 bytes
SHA-256: 34d2f39b498a7834680da4f2c757ec9a420a2c9230b5e3e57b6f7f52596cf5a7

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