Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6b319752f9e97d…

MALICIOUS

PDF

77.1 KB Created: 2021-03-03 07:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f9b0f8e9538f5fd8f785ff3113381024 SHA-1: 6a0aab8fc15b6e46bf6754f9ef8ca3fd1be39fd5 SHA-256: 2f6b319752f9e97d630c0d8d71599cc5a8bf2b829dfd09efe27fad9557094e05
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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
  • 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://xezojetit.ru/wb?keyword=bolt%20action%20vs%20semi%20auto%206.5%20creedmoor PDF link annotation
    • http://kumazekewenow.22web.org/24598621214.pdfIn PDF document text
    • https://nodepuje.weebly.com/uploads/1/3/4/5/134518199/tasax.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/dikaxejuso-xafalatiba.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/dff4f3b.pdfIn PDF document text
    • http://taroburi.iblogger.org/47646360704.pdfIn PDF document text
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/bowowoz_jojodasiz.pdfIn PDF document text
    • http://zatawonilar.iblogger.org/52385032741.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/jixeremipet/1208403430.pdfIn PDF document text
    • http://tuxumojidozol.rf.gd/87566618107.pdfIn PDF document text
    • http://guvivewemubalef.epizy.com/afficheur_7_segments_anode_commune.pdfIn PDF document text
    • http://turepebixorara.rf.gd/windows_10_home_single_language.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_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 5504 bytes
SHA-256: 80bbcc9e22527667ee9299a3bf5af2d9b0a5c4822ad52ec1e4003c0a9e9ad32e
font_01_sfnt_off000103cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 10420 bytes
SHA-256: ac0a43931038478fa22899a868767ad4cd2c8cd8c86bfb7c2acfd0bf5ff4d0c3

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