Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62e51d8554e411e…

MALICIOUS

PDF

67.5 KB Created: 2020-11-11 17:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 529cadfcac3bcba4917f6a8f799aa2e6 SHA-1: 8c3c20eef0c2a96669df5bfd9c7c0cbaf6296ff8 SHA-256: d62e51d8554e411e8d17bec0de708368e9ecfde7fdc5c2f2dd867c3d23cc9f04
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO abuse tactic. While no scripts were explicitly extracted, the PDF structure and heuristics point towards malicious intent, likely to redirect users to compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafffi.ru/aws?utm_term=saucony+hurricane+iso+2+vs+guide+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f99760c27b04.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/f9e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8bdfca287aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5f8e341625ef1.pdfIn PDF document text
    • https://luvuzinek.weebly.com/uploads/1/3/4/5/134502649/3884876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_5f9158228d8c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_5fa98dce29b97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/cod_bo2_origins_fire_staff_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e35ad72-ad7d-4f14-b68e-3df4617a6a51/28484621034.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/29502231136.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/dosukumuzoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/641cc8ec-ff08-4219-8b51-8334bb46c4db/descargar_quran_karim_mp3_gratis.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC21 5760 bytes
SHA-256: 8897eb19e6bb9cee8d0705be1bedf4b74923102f10474b980a17033ce73ee430
font_01_sfnt_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 9756 bytes
SHA-256: 6239dfc73705e070b8b6c824589a51c5cd184152cd833cdb0ef61d6e59c0c828

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