Malicious PDF — malware analysis report

Static analysis result for SHA-256 674640344fc69056…

MALICIOUS

PDF

95.0 KB Created: 2020-11-19 21:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bc7b23f88ae8adf5ec9e514ac936d05c SHA-1: dceed466d235981b424f77b293d813731ce20df4 SHA-256: 674640344fc69056e92314287b727217b769dd140f7de53fa19d420cebc52b0c
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=alexandre+desplat+obliviate+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5f977aac2678b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_5fb54531cdd72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f8e78b4a6c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fa4b61347bda.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/bumaxafenete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_5f8b9ec040132.pdfIn PDF document text
    • https://ledatomonuv.weebly.com/uploads/1/3/4/6/134686063/f85a5a.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/begijufadi/subixegunedunan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2110bdf-38f2-4b2a-9b90-6bd280886c4c/5937403605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed25f009-b403-4d5c-be39-86827b5e51e2/per_our_conversation.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/94802680581.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/wetafogekixesujafelol.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5D 5572 bytes
SHA-256: 8c0291eb6e3d4d62f43c7bb66cfd2cd4b07d1efeb728ca4b49090977d6a0b3f0
font_01_sfnt_off00012f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F26 12668 bytes
SHA-256: b9580b4c112e5bb421da1ead66aa1a9d6ec577c6876d71b85e48b12bf018da09
font_02_sfnt_off000158aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158AA 16300 bytes
SHA-256: a272f4507138f5a43ba8ece9016ab72139d8382426091da980912db920602c9e

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