Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4701a77859cd1c…

MALICIOUS

PDF

85.3 KB Created: 2020-11-17 07:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: efeaedc214b65983992ba16ef2f92447 SHA-1: 2ba6e90d70093e4c531ae3f080a3349d6932c0be SHA-256: 4d4701a77859cd1c713b26bcf124b6233396f7de71bddcc1bc66dcec807e50fd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=bakugan+game++for+pc PDF link annotation
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/3724686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f8b7899be04d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_5fad68666a091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5fa12bf6b5b16.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/2726850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5fa1f9d0a63a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5fa22b30304ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f927b83206c4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zafaronivaj/lixetipabu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/gakelofa.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/zabubojowulolironet.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/pivop.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/sadusafe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10480 4992 bytes
SHA-256: fd33d1c428c50869a22c11b3ab56173d37a037cee30e67098b887b451c3eeee1
font_01_sfnt_off0001155f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 10728 bytes
SHA-256: d39f6784755061ecca71ea329dff2f6c4299fbc56fd2257efa50694c918afeb9
font_02_sfnt_off00013a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A18 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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