Malicious PDF — malware analysis report

Static analysis result for SHA-256 94077470c31a921c…

MALICIOUS

PDF

83.1 KB Created: 2021-07-18 01:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8be89063e62812d4b67f18c06b76fd1 SHA-1: a436a6cf1de63946935aea0b02d21c567737300b SHA-256: 94077470c31a921c42ce82ce26af3326b5e72972a0bbd95fe564956c726cd7bc
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of numerous external links indicates an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/leregeximumuxupiki.pdf
    • http://amadpich.com/userfiles/file/razarika.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/53f9123d3d123306d1010b91b5e05b69/37141354307.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d4497673c---gomiwafarubek.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984079caa47---37614107458.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072395e70ffc---69893682535.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2a2167734---litusukapebovajen.pdf
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/modolekejajavadakatugan.pdf
    • http://libron.pl/fckupload/assets/file/96330564437.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/0b5782ea1a901391ae0ef4f689eba64b/81570501050.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/d1c41f3f793b3fbf97d10e1ff1b4fbe0/xulamixulas.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3b04a3731---dixoxore.pdf
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/64259974749.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fef0fd1447---95705405578.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160b457c569b35---21966069146.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8862f3d8d---zuxoxisimutegutuzosema.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0011ba0c3---84572902213.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0296f31b84---kefurabejujutege.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/9345b5ed14dc49a2a8c7afb817d3902f/89063065297.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/8ul1580m4nj0nsu00j912ar5vq/13007448971.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071749e42fc2---54500908357.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ac25271ef---karunor.pdf
    • http://renovator.cz/files/file/36194826048.pdf
    • https://mwasafat.com/uploads/files/50920855550.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+largest+artery+of+the+body
    • 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_off0000e69d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 16792 bytes
font_01_sfnt_off0000feb4.bin
909c795aae8d7118c9d0a452b06ce7b170dfc720cfae6622dddf7d906e9a6a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 10656 bytes
font_02_sfnt_off00011716.bin
53f7888331d4260b824b02579f887f03e3183001420700dfa19e447525458fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11716 15948 bytes

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