Malicious PDF — malware analysis report

Static analysis result for SHA-256 910a54f7fd9d8ecc…

MALICIOUS

PDF

94.3 KB Created: 2021-06-14 21:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4031e4cf1177a5be4089ea6eaf410801 SHA-1: 402e31cd6ee9e769b6ed562b0e4278fc40b0162c SHA-256: 910a54f7fd9d8ecced43a0c2291bd6b90fa5eff4bc6285f9d16b118154ac20e4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://garglob.ru/uplcv?utm_term=harley+quinn+movie+watch PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/diguziwasari.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f21470a54---91219061614.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/115b868d260677e9f9610577f29f7bba/80727375286.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/hobleqmbtemudu2m1vh14flcbq/64707239429.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cee27d60f---zerekogonuwezeliworiwerem.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b5185ee332df28bd75dd9a862180c4f3/satawidoramerawetu.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file/%5C/jedulisub.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/md9e2pbpsjt3ju5oihd33r38k5/botofedatalok.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/uc8ie3j4gt29ib93a8ua6a7mtj/80379143205.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0e442994e224417ad790ad45490cf7b4/ruxapaniwogegubamedob.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ceaf29b1e---tuzitebinuwiwej.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/45089084554.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/4hmg1120hlp41q2hqfquk8hfj5/47055569846.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/99433319304.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/1e9e44ff526efa25a9bfe5d206547fb6/50873560832.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/31d6222baa30af1555030b09a9faeec1/98766158569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11681 5084 bytes
SHA-256: 517bed4d41c10b21e7183e58cfb6c1f5be0d7b4b8c440313dff00a625efaad78
font_01_sfnt_off000127b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B1 4404 bytes
SHA-256: c92fc03da3b3a4499771d01a2c1d8a1210086ad1881e3ae46aa5d670b2cc715d
font_02_sfnt_off00013784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13784 11372 bytes
SHA-256: 5339c49f1f06fc0e7d2adbcca5e190980723a33e0d34b379dc88211639e7e794
font_03_sfnt_off00015dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DC4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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