Malicious PDF — malware analysis report

Static analysis result for SHA-256 4910f399867e29c1…

MALICIOUS

PDF

88.0 KB Created: 2021-01-05 06:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 262cc4687c82af4bd9320651e2671fa2 SHA-1: 31ee2b1dc8c38be878fd08a63e4515a5dacb6a6d SHA-256: 4910f399867e29c11323688b29adf201e0ebb66e35e871350d4230f951b06c40
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffset.ru/aws?utm_term=apple+ipad+user+guide+ios+11 PDF link annotation
    • https://puwukozo.weebly.com/uploads/1/3/4/5/134587621/xipafoturesoxi.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/mimefeged-tibaworifimefab-xigovifezode-kutanakufizov.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/rivunipojowe-sajagozas-gilenabam.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/tejinewefizaxaku.pdfIn PDF document text
    • https://ruwiwiteviporiz.weebly.com/uploads/1/3/4/7/134767377/veguligofivo.pdfIn PDF document text
    • https://zizolewezefid.weebly.com/uploads/1/3/4/7/134702939/450705.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/gowebabuxogiro/apache_http_server_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/hugoton_royalty_trust_unitholder_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/unir_dos_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/fibowelomizi.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/96500063580.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/40217917636.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 5168 bytes
SHA-256: 97ae3955560f667b52163a8cc6b38805e70db5a66229faeb898025ee1c9b6e00
font_01_sfnt_off00012cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB3 11304 bytes
SHA-256: b1ee2cc3a455647c480627b8fc0c958e5bb541098666816ee09885aea50786e2

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