Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a8878630b4f7dc…

MALICIOUS

PDF

50.6 KB Created: 2020-11-10 22:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de095af4ddc87d7c35f31a96aee584ab SHA-1: 735efefc0be3bb8d72b56d994b97075df21dd356 SHA-256: 43a8878630b4f7dc137a21ae2f908f09e9f845089eff1f6bb0701a4df8adc962
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and the ClamAV detection as Pdf.Phishing.Trojan suggests malicious intent. The embedded URL points to a suspicious domain, likely serving as a landing page for malicious content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8156

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?keyword=jet+promo+codes+2017
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f8987f4eba61.pdf
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/tutizakozetelikoza.pdf
    • https://cdn-cms.f-static.net/uploads/4449965/normal_5fa80d47e39e2.pdf
    • https://mafopobivo.weebly.com/uploads/1/3/4/3/134322173/6c57b6462.pdf
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/4016286.pdf
    • https://sukewemuzi.weebly.com/uploads/1/3/4/6/134668821/weridov-lekireda-pupefefezo-zedoxenuvoses.pdf
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f881a6d936b7.pdf
    • https://bosesabefo.weebly.com/uploads/1/3/4/3/134362720/24b1f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/385d8c5f-33a8-4cf8-a3e4-c5b6055a0226/xubawudatatodu.pdf
    • https://s3.amazonaws.com/juvuwaterexaf/mowub.pdf
    • https://uploads.strikinglycdn.com/files/cb499b36-ab6b-4bde-84c5-c9adafa7f6b5/99092332235.pdf
    • https://s3.amazonaws.com/zunaduxa/the_red_queen_book_matt_ridley.pdf
    • https://s3.amazonaws.com/gagagakigibapo/measuring_and_classifying_angles_worksheet.pdf
    • https://s3.amazonaws.com/memul/7674852666.pdf
    • https://s3.amazonaws.com/ropuba/duvubuvodakiselarude.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b304.bin
0e61082a55e4122d00e5a55ecfce114e4c737a86463ac7d8b7a84fede4c31a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB304 5372 bytes

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