Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af794ae436e17af…

MALICIOUS

PDF

79.5 KB Created: 2021-09-11 14:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 90ab1b7f0929a0701feacb10d05c5b98 SHA-1: eb045c260295e5bb5e06238d6c112a453d941902 SHA-256: 6af794ae436e17af8e3ddf8c190a77919c53f02df17b8e0aa9e82c5d726549da
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs point to suspicious domains, likely serving as the next stage of the attack. No scripts were extracted from this sample, but the overall structure and URL findings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

Heuristics 4

  • 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
  • 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=dream+tv+apk+2021 PDF link annotation
    • http://speckrepeg.by/UserFiles/files/jututakiwinutuv.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/lipomego.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/920866896.pdfIn PDF document text
    • http://parilka.by/var/upload/file/mijitutusekodolenarar.pdfIn PDF document text
    • http://scsychem.com/upload/files/63009837957.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/magiganedaxa.pdfIn PDF document text
    • http://p-energo.ru/content/file/58200652156.pdfIn PDF document text
    • https://designclarf.it/file/43393447313.pdfIn PDF document text
    • http://consade.com/userfiles/file/jilelinemizidodazurega.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/salamipasijibemo.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/pekefipifexexu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a7b26da03cbd6a5a4cff66fa15b7cdce/75978212862.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/romulasafavaguv.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/tejemelefonufurofavujege.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/46227836409.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/xujudibulizav.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/fewiwuwejakezume.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/8046289036.pdfIn PDF document text
    • https://autoskola-scp.com/files/surixirijupop.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/67791869553.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1630803515.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/51023039810.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/42199800136.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/87112175365.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/66262046305.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210907161529.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 17792 bytes
SHA-256: 1f193edc04dd2d83b1b7d6f587f3139e22d21bb19685e68c5277c1ecc6f5de84
font_01_sfnt_off00011ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1