Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab1017d5a327d8a…

MALICIOUS

PDF

75.4 KB Created: 2020-12-28 06:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ed0776bbd854843cf50d076ffa2349a2 SHA-1: d0abf4b4dca437ee177e76094b9ad01a8cb36124 SHA-256: 3ab1017d5a327d8a11abb702638ca2903b2f20c63c6ec13427d2b505eb9b2c87
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and a machine learning classifier. It contains a link farm with 20 external PDF links, many of which point to disposable hosting and redirectors, including one targeting 'epson all in one printer software'. The presence of numerous links and the use of a redirector suggest an attempt to distribute malware or conduct phishing by luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=epson+all+in+one+printer+software In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/4665135.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/8sjggrL/javamozizaboxemasu.pdfIn PDF document text
    • https://medimigo.weebly.com/uploads/1/3/4/8/134864966/pejejigome-filuxinopus-mezapo.pdfIn PDF document text
    • https://tomovomat.weebly.com/uploads/1/3/4/6/134617768/5156878.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/peparaximezur.pdfIn PDF document text
    • https://posuzelivoj.weebly.com/uploads/1/3/4/8/134869480/buguvexibus.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/igqjeNU/cheap_international_calls_from_mobiles.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/wopari/54706485237.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/45085465265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a3d4a3-d5e2-4458-86dd-b9e4d846dbe0/82571632166.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_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 4944 bytes
SHA-256: 9aaa709cda19e582e82e40559cf22d073a9cb2b1d242149ac1f180dded6aec13
font_01_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 10608 bytes
SHA-256: 1e53fe843d99e24d344573091a0387c61d813f775a9b4d973df35c5bf72dec2b

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