Malicious PDF — malware analysis report

Static analysis result for SHA-256 3198ce74871d3912…

MALICIOUS

PDF

70.8 KB Created: 2021-05-30 06:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10adde5214e09d1c1a53f13364fbea52 SHA-1: 764bebf3f4881f448dac78aa89d2fc44ab3389c8 SHA-256: 3198ce74871d3912c4e7f1817672833a10a4d2cc057c4e71f9b8664d1c8a5321
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to deceive users into downloading malicious files, masquerading as a trading patterns guide. Heuristics indicate multiple links to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/usf5t2j5v6n0o2lj822f8pank4/xusuxek.pdf
    • http://allycatering.com/userfiles/lenumudakusunesipexusabo.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/30007ccec486c26b69168d9e3ce97f9d/5453046292.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160792c77e544d---zimotut.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d602e0472a---xejamepuwitesapudikibo.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bcc687aeb---94364770026.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c933b15d6b767087d56ccd18eea089bc/67491264436.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f8400e8c7---48423928310.pdf
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/f12771694bb4a6f2c99559002b881b6a/95567188153.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/mq1g9at5c45afh2j5id7a00l62/gokirezafinumezasebato.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/eb8c8b42b4e3787ad9e55af93c0c5b1b/gobimedolovajagifupu.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/walugaxabapiditulivarujo.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a5135fe3---3709305089.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/0f3e7e3aba18c706a36de9a34a9aeaf2/gedolativulinan.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccc537fc0---zarikikirutobavetoduro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=high+probability+trading+patterns+by+kora+reddy+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d928.bin
85edfacf2db715ef778d3942dfb615635f92fd6c27173b52c31eb356232744c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 5660 bytes
font_01_sfnt_off0000ec74.bin
d7941be42dfae19075f14c80f7caec5a26933dfabe9d9a68efc65169dc6030b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 11044 bytes

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