Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd30fb99f2e6175…

MALICIOUS

PDF

57.2 KB Created: 2021-04-10 06:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0f6ef1fbef5a6deff04688cc41aa1da SHA-1: 7ae65b63435d4545d323d3818346539529826e6f SHA-256: 0fd30fb99f2e61753ad0b7ddfb9a57d4330f252793083ddb4339877063598dbf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7188

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://spotlight-sites.com/sites/default/files/webform/4279473489.pdf
    • http://seiary.com/sites/default/files/webform/rec/kutovaduro.pdf
    • https://www.natsihwa.org.au/sites/default/files/webform/21073527915.pdf
    • https://www.jsif.org/sites/default/files/webform/54250685962.pdf
    • https://www.ofalloncasting.com/sites/default/files/webform/gegemapoxazokex.pdf
    • https://www.a1touchsolution.nl/sites/default/files/56489371510.pdf
    • https://www.mothercare.ro/sites/default/files/webform/resumes/topijetidilotifoga.pdf
    • http://pilgrimland.com/sites/default/files/webform/resume-uploads/41345860665.pdf
    • http://pilgrimland.com/sites/default/files/webform/resume-uploads/woluweweketasuzizolog.pdf
    • http://www.guninetwork.org/system/files/webform/heirri_proposals/80098342864.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=bee+swarm+sim+codes
    • https://www.ice.cam.ac.uk/sites/www.ice.cam.ac.uk/files/webform/xegenaxug.pdf
    • https://lib.asu.edu/system/files/webform/90369837207.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d93f.bin
5e4caec914d7e725c790b245bcb889e02985a68deb741d143ed9bceabf3a56e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD93F 4796 bytes

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