Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6dc830d728b986…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 00:34:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0620467b430338e7b2c4783a982d7fb2 SHA-1: 28475ed4c0b786246c9af5fcc361707e0077ce7e SHA-256: 2d6dc830d728b986d6f5463af825e194c7a89dfa3d83eca1fea257f8b8bd24e6
124 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated maliciousness. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The document body is unreadable, but the presence of many links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5408

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 http://autosoftware.company/autoresponders_images/files/8623060536.pdf
    • https://coebmsf.com/userfiles/file/30894062714.pdf
    • https://golf-tout-terrain.com/publish/page/file/rowawosupesi.pdf
    • https://tnmkor.com/FileData/ckfinder/files/20210913_A461A19351A0C47D.pdf
    • http://shinex-auto.com/userfiles/file/jogoberelemaki.pdf
    • http://veewood.com/file_media/file_image/file/61947540936.pdf
    • http://massarentearchitettura.com/userfiles/files/94923755409.pdf
    • https://egca.fr/userfiles/file/sanogisaxomowurowomamugom.pdf
    • https://indobaliart.com/sitefiles/file/ziloponelofulir.pdf
    • http://nitexprofi.cz/userfiles/file/27632109779.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86106427034.pdf
    • http://precisao.org/files/files/60231880344.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/sofodeduxojawagej.pdf
    • https://anhhuynoithat.com/asset/files/popuweli.pdf
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/58835987075.pdf
    • https://tese.in/ckfinder/userfiles/files/rawavekekovumis.pdf
    • https://nutricount.cz/UserFiles/File/gomowelekenemirewazobeka.pdf
    • http://abwmountvernon.com/uploads/files/nivewapapedaliwozubarowa.pdf
    • http://www.og2c.com/images/file/tawozisopizilenigodev.pdf
    • http://skupka54.ru/upload/m/wilovo.pdf
    • https://cbconsulting112.ca/userfiles/files/judatibobe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=virtual+backup+apk
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109e0.bin
0064fb29583792bb4d768280b68932efdb967e5b412d338e3264f5e289157ad6
pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 10144 bytes
font_01_sfnt_off00012077.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12077 16792 bytes