Malicious PDF — malware analysis report

Static analysis result for SHA-256 e767d7a58f51ff8f…

MALICIOUS

PDF

72.3 KB Created: 2021-10-14 08:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5d357145817b8f30de96180d149a78bb SHA-1: e867454971cd5179756c2b96eb758bdf89bea236 SHA-256: e767d7a58f51ff8f247e7f1a0ce0310a6d97a19f50adcccbf96f6884305111f5
124 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable domains, suggesting a phishing or spam campaign. The embedded URLs point to various PDF files hosted on potentially untrusted domains, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6402

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://azco.friend-match.com/upload/files/wufazimulajuwevu.pdf In PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b75df452f7---tizasa.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/33990209493.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/49006112575.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/70097566356.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161544ad6d8fbe---45823904200.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/papoma.pdfIn PDF document text
    • http://tid.vn/upload/files/62319862003.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/18895568603.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/58258477323.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/34034994226.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/vubaxesef.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/gevitokupes.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021991732374426.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/jedelebofar.pdfIn PDF document text
    • http://vhktn.at/images/content/files/31003586547.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/16380477145.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/1hHberoKktI/uplcv?utm_term=how+to+mark+books+as+read+on+kindlePDF link annotation
    • 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_off0000cf7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7F 10716 bytes
SHA-256: d03e1a03624ecb7ae3f4ab102a0a12a650fe67f8a52b76b70e2ed4a82881206b
font_01_sfnt_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1