Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e5d4044ad6db1f…

MALICIOUS

PDF

57.2 KB Created: 2020-12-04 07:17:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 110d8c384c264e69a7e674f2aaf18140 SHA-1: 7f0512897cd014b8d3b54c4c07fe97385fd48288 SHA-256: 69e5d4044ad6db1f639a4e0ae894c16bd0ab37d26479daaa84e6a5de7038f1d9
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, forming a link farm designed to redirect users to malicious websites. Heuristics indicate the presence of malicious redirector links and a link farm on disposable hosting, suggesting a phishing or scam attempt. The ClamAV detection and ML classifier further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=guidecraft+book+cart In PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/dokadoxamelapiwiso.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/2bbe70a336.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/jitevufimobopepaxib.pdfIn PDF document text
    • https://garaxawodipadi.weebly.com/uploads/1/3/4/5/134595678/b1018f0.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/21ab799c1be.pdfIn PDF document text
    • https://bolusawowena.weebly.com/uploads/1/3/4/8/134894851/dubifikusebetirotoda.pdfIn PDF document text
    • https://sokexeziboril.weebly.com/uploads/1/3/4/9/134902232/6385487.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/gedimuta/wifodigakujazura.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/vemapevixinibasamukijem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5adc803-a3f2-4fd4-8f11-c70c7c9a1e9e/87618109330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7f8935-982b-4fd3-93cb-dae743432167/best_cdma_flip_phone.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_off0000a6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D4 5040 bytes
SHA-256: 1bda26d832108e7d07f317cecbc5a0790fb4a6d7bf518184fb56f26dfe429300
font_01_sfnt_off0000b80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80D 9520 bytes
SHA-256: f68c403b8636dd8011015890bfec64b7faf80d64621d7f94bf819dc6a28bf565

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