Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a44c2a213de2ea…

MALICIOUS

PDF

70.7 KB Created: 2020-11-26 09:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b191afaac1b786d61f6d55ef746ee0d SHA-1: 9cbdd3046cf4ff57fa5ceb5bc229e90de25fbf48 SHA-256: 04a44c2a213de2eaeb3bee089275fd8c8572b15b806f0b07a39a7cd0b5ad3f1f
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://traffking.ru/strik?utm_term=ez+battery+reconditioning+scam PDF link annotation
    • https://buminezavo.weebly.com/uploads/1/3/4/6/134650892/ecde6f60.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/3393008.pdfIn PDF document text
    • https://gagijilit.weebly.com/uploads/1/3/4/8/134865103/tijajopob.pdfIn PDF document text
    • https://sotalopi.weebly.com/uploads/1/3/4/3/134345355/finanutixomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_5f9d2c28d955f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_5fb2c0ff33774.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://zizavoxepob.weebly.com/uploads/1/3/4/4/134479394/d7e94016a9.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/bolamaratokineb-wasumezusopu-zenujebimosoj-pexug.pdfIn PDF document text
    • https://zusamazoboxo.weebly.com/uploads/1/3/4/5/134527389/tarezon.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/381dfabf-e43d-47e6-8b14-d748d4de6fe9/84736570735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4c439f-335c-4c45-bf71-559dc113b5eb/manual_transfer_switch_with_50_amp_inlet_for_generator_connection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febffac6-e0a0-41b7-b74f-e9eff4614413/26406294707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67346c83-70c3-4d72-9677-b707100851bb/arm_cortex_a8_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4c3ffa-16cf-456f-a2ab-c2261239278a/joxijofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60833c68-ef17-4cb8-8df7-3481e9264688/mevalagafosakafuzikoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050fa8fa-ab0b-455a-8fba-d6aad944f366/3859927099.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 5476 bytes
SHA-256: 26b09d87f1edec18341889b15f24145b2cfedea1baa61c7887b587ec98426480
font_01_sfnt_off0000e98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98C 10828 bytes
SHA-256: fe48044fc529a64ecb6c20d37826025fbb1641155c445d637972b224b9f59002

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