Malicious PDF — malware analysis report

Static analysis result for SHA-256 300c3b524419f062…

MALICIOUS

PDF

71.2 KB Created: 2020-11-11 16:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7c620ee39f7d6f90ec777e2b62594650 SHA-1: c85b4bf559d28489eab013ae2d7255994bf8a16f SHA-256: 300c3b524419f062d77250c846bafc78f120b919a53ed5767fa2e1328016917f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=my+happy+games+angry+birds PDF link annotation
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/a2fc91ccb6.pdfIn PDF document text
    • https://moxowikoxub.weebly.com/uploads/1/3/4/0/134096036/4e1e1894faa6.pdfIn PDF document text
    • https://defagetomorig.weebly.com/uploads/1/3/4/5/134576552/5216319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8b709e5e0e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_5f886585a89ba.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/jolituzoji/34830417688.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/parcc_8th_grade_reference_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/tivegazex.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/america_settentrionale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f054f4bd-d78c-4cda-9e0c-eb3ca362d408/loft_living_zukin.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_off0000da4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4C 5588 bytes
SHA-256: c7ad4e8bd40ae67dd540d62c4cfd7e948f149441ca29acba459f0f515d45a8f3
font_01_sfnt_off0000ed2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 10348 bytes
SHA-256: 0d59c43f88a2f9add0aa7a4a36ff1b3e70219edbeb184fa69ea439835e69a127