Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b978b6af4a1a05e…

MALICIOUS

PDF

70.9 KB Created: 2020-12-31 14:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 782c95efe8689864f09fc73b12bd7b74 SHA-1: 259fd08d4d51e91495949d44b29673822fae6454 SHA-256: 8b978b6af4a1a05ea2223dbb838c1a703c45baad9627030844a93bebc7a1a5cc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for a link farm and an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a malicious website.

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://trafficel.ru/strik?utm_term=fill+in+holes+in+wall+from+nails PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f8bac5d35646.pdfIn PDF document text
    • https://relabibede.weebly.com/uploads/1/3/2/8/132816075/5859709.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/memul/cheshire_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/renewable_energy_sources_ppt_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/24098656146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92e451da-c15f-4c18-9fc1-278e3ae4738e/89205106085.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/journal_entry_worksheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/45152659356.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/31903757463.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/millennium_development_goals_india_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69de3958-ab23-4d11-ae7c-b395d617c7ef/p0446_chevy_silverado_2007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e9da66-e852-43dd-b0ae-633cf8724a1a/nosejule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21872425-e75a-4561-a1da-ced5f831d8d3/46143220207.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

Related samples 7

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_off0000dae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE7 5056 bytes
SHA-256: e15f2a46cc3c46b024b1c44b6c24bd16822dee6669a8d2fc4f02ad1af233b3c6
font_01_sfnt_off0000ebff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFF 10308 bytes
SHA-256: 122deeba2482a3f5e896c40e9a2843807872ecd3cef20631f57be987ba94a776

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