Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec63a4f62040745…

MALICIOUS

PDF

70.1 KB Created: 2021-09-20 05:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e9d581e6b3bdea83e1d57403afd87825 SHA-1: 3b038a6dc371e69c4d828c6750a2b13b0d7e9663 SHA-256: bec63a4f6204074501ae7b7a9c0c0ac63fd5a0c79a4e31229b857a401d9ff0a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The primary URL, 'https://pixomot.ru/uplcv?utm_term=coc+free+gold+pass+hack', indicates a lure for potentially valuable in-game items, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pixomot.ru/uplcv?utm_term=coc+free+gold+pass+hack PDF link annotation
    • https://equimat-cheval.fr/file/82303971686.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/14643383860.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/62761212100.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/zitibitivugurijilofuw.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/sutojimexukag.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109121935436929.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/24518907327.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/161445b624a786---xegibuwabevexakixujupedul.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/burerabita.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/94738941698.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/42992113039.pdfIn PDF document text
    • http://crediramasrl.it/public/file/23512469036.pdfIn PDF document text
    • http://gestmase.com/media/images/file/zipovixuzibabo.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/sedepewawosaguzevewuk.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/899068926.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7bc878e1c0a2b18bb1bbd181ea405ffa/16853031729.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/70497974995.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/wafidusanalavadefav.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/7848213899.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f453a5f689---kamalu.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/lelawukaw.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/polenokozajizos.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/006d73fb7d95823434a13ce0d2aa9bbc/walupoboneseluzanag.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/f023ffa77b5c9d8ef389bd05eb7c3290/xaxir.pdfIn PDF document text
    • https://chuyennhakienvangvn.net/upload/files/gipilimonivefafokogi.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA80 10728 bytes
SHA-256: 972b58cad031780ce7586cd2e6f0a20aee913a852d78d9159493fce9c64107b6
font_02_sfnt_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 15848 bytes
SHA-256: 8048b1df77ce6c83a5b501579b12d9408033797b8e1a7fcaab45699d53897485

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