Malicious PDF — malware analysis report

Static analysis result for SHA-256 76307a4405e7cd34…

MALICIOUS

PDF

80.0 KB Created: 2021-04-21 19:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ed74bf480d8c1aead2fdfe616574938b SHA-1: 943b51b89e7ff93a28fa27e9b3f42a8ee2588c35 SHA-256: 76307a4405e7cd34074ef49361217eef8c9ceba404dc6a7fb41ec966854c927d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'https://botokaw.ru/strik?utm_term=rascal+600+mobility+scooter+charger'. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0'. The presence of embedded URLs and the link farm nature strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://botokaw.ru/strik?utm_term=rascal+600+mobility+scooter+charger PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454665/normal_6063708938e9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_6008cd4b79f95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_601609669f742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_602eb0e0e9644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_603efe3891b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fe628f9ed120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5fda34fd209bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_602abdab499b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490122/normal_5fc911050bc1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5fd15eb21e6fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_6056fe12081db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_60228287d2da6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454168/normal_602a0b93080dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zikeko/88068572179.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/jack_welch_winning_chapter_summary.pdfIn PDF document text
    • http://sigedasubaduvep.rf.gd/3814679216.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/manual_canon_ae_1_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/datozewugedivelixowir.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/marketing_information_system_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/company_law_introduction.pdfIn PDF document text
    • http://mujujum.epizy.com/24416652082.pdfIn PDF document text
    • http://xodubepegiluli.rf.gd/berekening_annuteitenhypotheek_formule.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/wepizogezazaza.pdfIn PDF document text
    • http://jupanev.epizy.com/canon_ij_scan_utility_mac_os_catalina.pdfIn PDF document text
    • http://moxododokojuke.epizy.com/microsoft_excel_2013_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/wotakoxufusuwap.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_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 5760 bytes
SHA-256: 1d73930658df79c785fbb6c34c50e46440873806d08ec89c379e2e57be916b84
font_01_sfnt_off00010d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 10796 bytes
SHA-256: 25f05106fb243ccd5c46f2bb9efdbf2e668195b586bdf333e744eeb82b4ef9d2

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