Malicious PDF — malware analysis report

Static analysis result for SHA-256 4120d0eb7b18b5a4…

MALICIOUS

PDF

64.7 KB Created: 2020-11-21 10:04:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7920d3d72efd987315b3a8d4db2cbf03 SHA-1: 5eadba56eac3dda6669b224579e8470d56cc3ed2 SHA-256: 4120d0eb7b18b5a4ca3c85da0bb0d05b9152ef2a1c47940dc763dbd1c155f6ee
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The primary URL, 'https://traffnew.ru/123?utm_term=ge+refrigerator+pwe23kskss+manual', indicates a lure related to product manuals, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and potential malware delivery intent.

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 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.
  • 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://traffnew.ru/123?utm_term=ge+refrigerator+pwe23kskss+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5fb5b6f874a62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f872642292a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_5fa0c159d18b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_5fa17e5936499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_5faa5a40510c9.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/katugix-didator-vasaguzifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f8bd65070529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_5fb86587c00ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390323/normal_5fb73b9baef03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/413a17ce-1e02-4547-a198-5222c3f02b7c/kososefobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22d2cbb-7ae1-40c0-b040-cb58edf131ba/560042120.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/algia_suffix_meaning_medical_terminology.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_off0000be55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE55 5704 bytes
SHA-256: 0e5c3e6e812872d64bac4325540947ba6a8944cb313d774981b9324ad33c2d48
font_01_sfnt_off0000d1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D1 10724 bytes
SHA-256: 109024eb3e9686fddeb303f6d8864d527355ff4fc45568651b61283c11ba0041

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