Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c954e4b892cd3a9…

MALICIOUS

PDF

83.8 KB Created: 2021-06-12 08:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72f834d2d53bce047d596e04c22fe47c SHA-1: b1a1d80e90c93f12166b6d39b0f85596f3091c02 SHA-256: 6c954e4b892cd3a96c878fd71ec94697473a84537529dde98fc2673ed6bcfff6
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs further supports a phishing or scam-related objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=online+movies+dual+audio
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606faead74550---guwadisidezorojogaj.pdf
    • https://noddy.nu/images/file/75900202596.pdf
    • https://fablab808.com/nbloom/fckuploads/file/65634679366.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878b73e1b14---48531706171.pdf
    • http://creptiles.dk/userfiles/file/xelikil.pdf
    • http://dungcubepgiangtrinh.com/webroot/img/files/zaweb.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/48ift68qeddg9o7rklv50avco5/30397418958.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ln6lqrree845mcoejl3ds4gcs6/95016439848.pdf
    • http://unityproductions.com/upload/files/puzita.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a72c69b0e9ec06f0f12b625ed596ded7/fumexizoredesi.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/67ba45cc284f6030022d25963e6cc423/42902430018.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16083b45200ba4---34333533840.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8a811a06---bebivakureziz.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1vug9arb90pj0jpciulqgtkao7/25069660769.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160852005ae993---50858931885.pdf
    • http://t-eamplus.de/web/editor/files/53804361313.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • 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_off0000f2a2.bin
ef9ba64dd1aacdf338153cf4eab54ff80d5b7247c288f7f53f767e18add5eba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 4964 bytes
font_01_sfnt_off00010376.bin
db7e7067783523685827fc3f9964181e62d89dd12c395862066bc3a41df108a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 11784 bytes
font_02_sfnt_off00012b5e.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5E 16204 bytes

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