Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f821f5237930dd9…

MALICIOUS

PDF

64.0 KB Created: 2020-12-05 00:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 812903cf62566fc8d6d19cecd6b554ba SHA-1: 95508390fc450efeb9c1ef8ae4991ae9d49bb600 SHA-256: 7f821f5237930dd967c657076adbed65638cd82eb1a914a163b57d02d07f41dc
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://traffine.ru/123?utm_term=kqed+tv+schedule PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5fa1561dd3bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f9c9d1152398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fc28de62e40f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460048/normal_5fc8d159e1245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fbc88a2ce0ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_5fb975e14e75d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_5fbed6b03a052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f9344c4bc875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375203/normal_5fc99cde2a9a9.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/7706544.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fc3fcd115f9f.pdfIn PDF document text
    • https://jifefovemerozix.weebly.com/uploads/1/3/4/4/134444698/5d0c2317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5fb53a3405b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5fbd8d98b3e7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0C 4876 bytes
SHA-256: 7f3be0a443e3b77757077d274b43cc47d064c20d32d970ae7162d6d4be535906
font_01_sfnt_off0000cfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB5 10492 bytes
SHA-256: d80ed99a74a3d1f4fda0cfe33b06379fa0521a5d67c1898e54a79c80b5d4deea

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