Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b6c52afb271ef6…

MALICIOUS

PDF

76.0 KB Created: 2021-04-25 04:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b163ad3fd9f236387bfb4b3d3161c41 SHA-1: 724d64e452070d807d6c06ec9d50e7eb39955814 SHA-256: b0b6c52afb271ef6edc8dad2fdc2e66f3a9614fd179adc9c2a5b99139c864cef
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 0.9997

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 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://nipisod.ru/strik?utm_term=farberware+coffee+maker+stopped+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411694/normal_60256c2fc5db9.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/powerpoint_design_templates_free_2017.pdfIn PDF document text
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/sifijaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454811/normal_5fc8301c1b093.pdfIn PDF document text
    • http://dopenukivo.22web.org/96960045492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fdb783d37224.pdfIn PDF document text
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/mosorevam-taresevuferefo.pdfIn PDF document text
    • https://voxugenones.weebly.com/uploads/1/3/1/8/131871951/896b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zunijakokusageg.epizy.com/bokudulerajagaxetewo.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_ab293028167e4944ae80363d45d32a96.pdf?index=trueIn PDF document text
    • http://mesesoriran.epizy.com/rigave.pdfIn PDF document text
    • http://magivaxinel.rf.gd/57386639247.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_8cd634f9c67a47d28a0b7503858921bc.pdf?index=trueIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_b61898097a5744f1ab8788f40cfdbd68.pdf?index=trueIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_5f291d454de14ec48f4846b6c4932651.pdf?index=trueIn PDF document text
    • http://musarozopod.rf.gd/opel_cascada_preisliste.pdfIn PDF document text
    • http://gexazavere.epizy.com/cisco_9300_stack_configuration_guide.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_29e5675f87694540b0a6d72e2d440ec8.pdf?index=trueIn PDF document text
    • http://dokajita.rf.gd/capitalism_vs_communism_worksheet_answers.pdfIn PDF document text
    • http://sugosabogakeg.rf.gd/weveb.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_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 5696 bytes
SHA-256: 8ab5fe080ae20d2e7e8b04e65d24b1b5b4043c4bd366ac94387170ff5e474141
font_01_sfnt_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 11220 bytes
SHA-256: 14f4ffeb39ab73dd1bd6a2d755c20b023940d8e18d83c226a359cf25bdd1c086

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