Malicious PDF — malware analysis report

Static analysis result for SHA-256 005c6c7bf3bc617a…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 15:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eed8b50cd8ade6c126c01290197edf6f SHA-1: 2fe55d343742a6056ace052fd098865adeeebed0 SHA-256: 005c6c7bf3bc617aaae55665e60bfb82acb527aac68b7ba03f6c681c3a650990
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a link farm on disposable hosting, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://giprozdraw.ru/ckfinder/userfiles/files/80509585079.pdf In PDF document text
    • https://jordan.si/dokumenti/file/subowomafaviragikifa.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210911125634.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/23222290013.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/vesemexogelibiboxa.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/tofudum.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/manibupi.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210915151038.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/92191280713.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/bovuguvimotekixi.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/kinawijamunenepu.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/34900186061.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/83065030987.pdfIn PDF document text
    • http://www.pvvc.cz/files/fegamojorakudowemakobemoj.pdfIn PDF document text
    • https://bdlvn.com/steel/upload/files/48389230560.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/nafulezozexuwunadu.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/35459518345.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/59033257881.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/denirapo.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/0c3303efcbcc54067a37ad513a91b036/wesixogunedapixezagut.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/dowebofomeborenazibalaw.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613530b211fda---10708136790.pdfIn PDF document text
    • http://twilaw.com/files/files/91498448352.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=best+ringtone+cutter+appPDF link annotation
    • 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_off0000d76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF84 10656 bytes
SHA-256: baea59ec1b649427c4d73cd0dfd6f6b88240c8201a4361f84815a40042b3e1d8
font_02_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 16876 bytes
SHA-256: 9148acacfc42e0a51eb91bf3cc8f95ec2ca4d533ff917d0852538a52055e2ff1

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