Malicious PDF — malware analysis report

Static analysis result for SHA-256 272a7ff511abe08c…

MALICIOUS

PDF

96.8 KB Created: 2021-07-27 23:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 096788cd81bb36730b4c1b85e76961c9 SHA-1: 696880127bed60c7840affef26a7b800d95fa138 SHA-256: 272a7ff511abe08cf34cc38e8daa9eb10d1f4293acb38979637e997893814f04
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/15cfcdedad05f2491e1337f76342bbcc/fanakejiko.pdf
    • https://qian-ho.com/upfiles/editor/files/19197278920.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0cf735f3e---89971750998.pdf
    • http://rauvuonsach.com/images/uploads/files/27075392912.pdf
    • http://bptramptour.pl/files/file/radegigobo.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/3c7d89af4d14f3b4e6d9b0991c4d1e52/tafuforaba.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a60303a224---6267003236.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160873eee95478---66744627346.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6dc4179b40aadc476ade19b404e0302f/71983693320.pdf
    • http://braciszewska-klimek.pl/fck_files/file/notojexut.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/8f1b414f98b8ec0c68505d7973714d5f/44001956118.pdf
    • http://maychaybocaocap.com/app/webroot/uploads/files/17107839946.pdf
    • https://willmarareachamber.com/ckfinder/userfiles/files/64034713474.pdf
    • https://led7.ru/file/48739671315.pdf
    • http://inspiredindianfoundation.org/uploads/mosabasabasunef.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/no50b368uo26386p60q53tnf46/besiwozarox.pdf
    • http://dsagco.com/Upload/file/82660051902.pdf
    • https://agermag.ro/mm/file/nijugokor.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d96b8ad15---5715058980.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9219b9135---lelebogirulaverexikik.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/5f3fb96a2d73e62fce79d166b9a09cef/30706039731.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/62468653c43737e78f8a74c7825ee7bf/dawakezukudakemupez.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/t5b4t9qbbnnjah45rmk1jaosd5/4048805901.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/455a6e543c8fa30d80a5deef6f6a3b30/72595351771.pdf
    • http://thebankcardservices.com/uploads/files/fozevolisuxudaduv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sibo+die-off+symptoms+headache
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111da.bin
e7b42f158ce12e1a384a4cb85f2c09f4c657c5fef3c73534131f45133d7c8ff4
pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 19600 bytes
font_01_sfnt_off0001436b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1436B 16792 bytes
font_02_sfnt_off00015b82.bin
48a601c2225a94d76e27041b7a7f89772a9934361e9eabd4034e6e75a2b29dd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B82 11000 bytes