Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ff6197d646f4e7…

MALICIOUS

PDF

68.7 KB Created: 2021-02-22 04:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 60e37b00771d24d193ba8cfd485cafcc SHA-1: 739c6cf1749594e2450a62c649c7798acd8bbe96 SHA-256: d1ff6197d646f4e78887b94ff29790293b97858c1a9c35e620eb22ac358761c2
206 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm and phishing lure, as indicated by numerous external links and a ML classifier flagging it as malicious. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of multiple external URIs points towards an attempt to redirect users to potentially malicious websites. The ClamAV detection further supports its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/strik?utm_term=moto+g6+screen+protector+walmart PDF link annotation
    • https://rexerobebaru.weebly.com/uploads/1/3/1/8/131872155/9ee56e718b6035.pdfIn PDF document text
    • https://lefonoduri.weebly.com/uploads/1/3/5/3/135324857/73b4905c.pdfIn PDF document text
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/wobixedotusijix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_6008cdc8e90d6.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/lozutuxosonulenyb6.pdfIn PDF document text
    • https://sugowixo.weebly.com/uploads/1/3/4/5/134588459/a948aa7.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/8d048161cc17e.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/505643061341jjo7.pdfIn PDF document text
    • http://8bitbeardsco.com/599449403518qu9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500877/normal_5fc8f16f72345.pdfIn PDF document text
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/e233ad9abf.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/fadusi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471945/normal_5fdd6359e4246.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/widifowiduti-vepadokevud-pogekofowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_6026a3107125b.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/tufitijinexu/construction_site_safety_inspection_checklist_template.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/gemofado.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/mendelssohn_venetian_gondola_song_sheet_music.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_off0000c61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61C 5504 bytes
SHA-256: d0e6d5466be11d765e6478db6d11178063574e80363af67433dd1b8622a41df0
font_01_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 14384 bytes
SHA-256: 802fc97d819c3a4e5cfaa644be40754c27303ae37b83b295c98a82a0f42ebd84