Malicious PDF — malware analysis report

Static analysis result for SHA-256 330875a87d745a4a…

MALICIOUS

PDF

78.2 KB Created: 2021-03-13 17:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 870b8f4f4bc686938eea1b8242515482 SHA-1: 9188c0536dbbb4c069d7862c95b36dbedd08b9bf SHA-256: 330875a87d745a4a086ef7f506789416b99f1a55d05ebd9623dd942447349ca5
126 Risk Score

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://ponafet.ru/award?keyword=anatomy+drawing+study+guide+pdf PDF link annotation
    • http://nikaold.site/questoes_do_enem_sobre_analise_combinatoriao6xv3.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/ifghbYf/cacaoweb_pour_telephone_android.pdfIn PDF document text
    • http://acgmgroup.ru/19796135914gxli9.pdfIn PDF document text
    • http://sparzha.club/singer_handheld_sewing_machine_threadingesn5w.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/55928551503.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/bardo_thodol_portugus.pdfIn PDF document text
    • http://werojati.getenjoyment.net/mugidoketujud.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/good_description_of_starship.pdfIn PDF document text
    • http://razadugufuto.22web.org/cours_grammaire_conjugaison_franais.pdfIn PDF document text
    • http://50offit.pro/what_kind_of_oil_does_a_2002_dodge_ram_1500_4.7_takelexp8.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/bgdejcG/wanuwolomidesixesib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_283b4c8d03234ecc95fe233a160697a9.pdf?index=trueIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_56da167d9eee42659bb1f0c7eb264bfd.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_743acad98dd94c82b35d77584b866384.pdf?index=trueIn PDF document text
    • http://roresor.rf.gd/35957354523.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_6c82157fbfc848da8bf424a9e0715381.pdf?index=trueIn PDF document text
    • http://folujas.epizy.com/kifopanu.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_2a6f89a5d4c0455794a9e93a0b88f4ba.pdf?index=trueIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_164da503ae2d4dac828b5d18d6b2ddba.pdf?index=trueIn PDF document text
    • http://wawopuviginase.epizy.com/14370956251.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_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 5512 bytes
SHA-256: 9d85ded7e5cea4995e4a416b8fb67a61dbd671e7fd2a858ee4f0ed4aa873eb5f
font_01_sfnt_off00010757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10757 10716 bytes
SHA-256: 51792b947f20ee25843e8b894bb6256dd142399fea4bcec744494fedee92c41b

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