Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c5546c10839f2c…

MALICIOUS

PDF

65.6 KB Created: 2020-12-08 20:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 14b184b6ee5b5e750784fd08dafa557a SHA-1: bf4e3ecd8e4883f9403e56a5a9c50e3d421f6f65 SHA-256: 75c5546c10839f2c313213ce5aa12d8a1d470f0a09fb77b69c4d85052cae7d71
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to redirector infrastructure or link farms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?utm_term=farberware+programmable+pressure+cooker+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_5fbbc62c808a2.pdfIn PDF document text
    • https://ratemalopez.weebly.com/uploads/1/3/4/7/134753477/6660839.pdfIn PDF document text
    • https://susokeruno.weebly.com/uploads/1/3/4/6/134656617/8140740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_5f9f98b40fd48.pdfIn PDF document text
    • https://dujefeva.weebly.com/uploads/1/3/4/5/134589135/sezebova.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/df178e0bea8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f89df11f3dae.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/162023fa-7249-4995-9ffd-7d7ba441db8f/megozoguxenome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98620763-a366-47eb-916d-bbf1851df334/sepasakenelom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2102d45a-3f09-480c-89aa-a6c4b0f5b77c/41955225963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfe5c34-409a-4424-9c04-7a81e4290978/lomilinizox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5451e286-3207-49dc-bdac-3225bb4a5b07/vetobodibujuditirusos.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_off0000c5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AA 5504 bytes
SHA-256: 5d00663d70367ac5c2610aa64e3d87ad99ed4e1bd60963cebe446c1512d1e568
font_01_sfnt_off0000d864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD864 9800 bytes
SHA-256: ab6db5cb90d79e3e2e7b418dd1e4cf609b49b57c90034d487b42086827576ef6

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