Malicious PDF — malware analysis report

Static analysis result for SHA-256 777c27adf95247e8…

MALICIOUS

PDF

74.0 KB Created: 2021-03-02 16:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dd369536de996828cc4b5b47cf1e7c35 SHA-1: 4ac7800d334b3a76b74ad374e40ea3177b1befd8 SHA-256: 777c27adf95247e83d4aca1b624f341aeb64f1c9143819d2144471ca73f2ee80
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware download.

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://ponafet.ru/wix?keyword=bet+college+hill+south+beach+cast PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406223/normal_5fc818fb16b7d.pdfIn PDF document text
    • http://vuzuwul.getenjoyment.net/widalaj.pdfIn PDF document text
    • https://mokakabatedi.weebly.com/uploads/1/3/5/3/135300589/tilovuwavevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_60183dbadda26.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/geO3xjh/24890367094.pdfIn PDF document text
    • https://kuwoloxafi.weebly.com/uploads/1/3/0/8/130873903/7793275.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/pevib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_6006aff1236f0.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/98291667711.pdfIn PDF document text
    • https://nimijakis.weebly.com/uploads/1/3/4/5/134577625/bemujurep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_6006b710d8e42.pdfIn PDF document text
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/rewuwemo-mejodigawep-maximojuzezem-zuwemuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 5152 bytes
SHA-256: e9f36abe3d8fd37f09950e387646f72d1ab4bce45530081d6b4cab4999234d60
font_01_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 10608 bytes
SHA-256: aaf74a89c06dda70e431261ee61f212541fd86774cd3737d6c59810dd822829e

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