Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a76037f18278ced…

MALICIOUS

PDF

65.8 KB Created: 2020-11-24 02:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4a304aa078cc2ca06f08286fb89702d0 SHA-1: daa7bd37254b1485bd8a3222c24be93258d38948 SHA-256: 3a76037f18278ced8f5a5e80edc51372d5844531b379819fff1ca5110b97c085
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=honda+outboard+serial+number+identification+year PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5faf83c9699db.pdfIn PDF document text
    • https://gekitudijelal.weebly.com/uploads/1/3/4/2/134265938/6935460.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/5e07aa38b2d30.pdfIn PDF document text
    • https://juwopivevonu.weebly.com/uploads/1/3/4/6/134682880/8162261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_5fbc22d39a2c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5f9a037d08f98.pdfIn PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/dupabaj-kovalozox.pdfIn PDF document text
    • https://ragikigoludu.weebly.com/uploads/1/3/4/8/134849848/lolamudikexus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464523/normal_5fa38ffe23477.pdfIn PDF document text
    • https://busaluvugisegiw.weebly.com/uploads/1/3/4/3/134368440/zobiderisosovobasag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c84219b-e0fa-4b93-b8df-57722945b1ad/alan_watts_become_what_you_are.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c8a750-0a43-457f-a501-168842085ea2/sansa_clip_plus_manual.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 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_off0000c572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC572 5372 bytes
SHA-256: 2d2a9a4df73acba1dba7452cd70c22ef60a2902f9dc3ddfa60825add71a8ef4b
font_01_sfnt_off0000d7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A5 10144 bytes
SHA-256: caa94f7ca6b837e7d283ee134e723ec4cd1b4a9c2ca0b1dafa7c694bc03cd230

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