Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdf3246ada728e6…

MALICIOUS

PDF

64.1 KB Created: 2021-05-07 21:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f5bb7bd0e0aef9a0e0b2051da54c4ac4 SHA-1: 547c7ed193ecafebf853de98e266e6abe1d28083 SHA-256: 0bdf3246ada728e6a4502671ba23aab2000901788c3104ac7ab5f4c73121416c
186 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 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=oster+oven+specs PDF link annotation
    • http://xifadezuzurap.medianewsonline.com/zedijonupido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_604844a181255.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/asciidoctor_maven_plugin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482023/normal_5fe2391a6cd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476418/normal_5feaedb807d20.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/the_fabulous_bouvier_sisters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_6020d1746e8dd.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/gjgeNjc/pexmor_yoga_half_ball_balance_trainer.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/8KhcLib/duketoperaxodavagenugufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_602ec6db69e9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_caece81e28364d77b7764e503d8f19d5.pdf?index=trueIn PDF document text
    • http://disoluje.myartsonline.com/76915368778.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_6b990249b01644ea925314a0eb614c62.pdf?index=trueIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_85478717d99c4cc4bc73d85872483c77.pdf?index=trueIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_11e902a0084a4d7f86170438ddbfa273.pdf?index=trueIn 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 3

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_off0000bf06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF06 4772 bytes
SHA-256: 89d43563c9fa70155cc5402b93d6227d0a485a3f2c7c0ed5e4583dbbb212dcfc
font_01_sfnt_off0000cf5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5B 10736 bytes
SHA-256: 4c4a1738444046a239b98e2311b455e4c32145b6ccb041863c031685f0a24ba0

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