Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7ea86ba458de59…

MALICIOUS

PDF

74.0 KB Created: 2021-03-05 10:20:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 05e7a88b603079fa6728bcea6988edb7 SHA-1: 27f0b12ceda20e7bd821f02849e01b209656f9bb SHA-256: 6c7ea86ba458de59800a003ad71547a18d65e498f8f420077f8d86d69549a289
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs and the document's structure suggest a phishing attempt, likely to trick users into downloading malware disguised as legitimate software. No scripts were extracted, but the presence of numerous external links points towards a malicious intent to redirect users to harmful sites.

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://bologen.ru/strik?utm_term=adobe+premiere+free+download+for+windows+7+32+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467581/normal_603875ee814f1.pdfIn PDF document text
    • http://laura-egorova.ru/nutemibujaday5in.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/whats_the_number_for_child_support_enforcement8b1lp.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/samsung_vrt_plus_washer_code_dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_60160077f18b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_601b91dac5fa2.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/hZYsb1j/59573936532.pdfIn PDF document text
    • http://custits.space/wawunadijebuig0io.pdfIn PDF document text
    • http://899themes-demo.ru/93224468097m598t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416305/normal_5fedc792e8b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_5fd22747d9a0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_6008d3c534346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383444/normal_60081bb0a6d0f.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/jO0ihSU/nulozavarugoj.pdfIn PDF document text
    • http://inscarusa.info/16105850145tgw7r.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/28036857845.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/wave_speed_physics_worksheet_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_4522f2a79eab4c9683de17fca5bbec57.pdf?index=trueIn PDF document text
    • http://rixigor.onlinewebshop.net/gizepefivozenusetofal.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/which_electric_razor_scooter_is_best.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_5e90caf8e5ca402e9882a5080751084e.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 5784 bytes
SHA-256: 0fd02a15aace4c2639937d4957430835f2703f3417d84edc35a5f650179e97ff
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 10228 bytes
SHA-256: 7ed32fbea9dfc1628f943755cb45ce0d2484f2d07dd85f128d8d868eab369801

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