Malicious PDF — malware analysis report

Static analysis result for SHA-256 701dcb031a757d99…

MALICIOUS

PDF

81.5 KB Created: 2021-02-26 15:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 96bf8397a135a6f49476920e224bbb30 SHA-1: 262fe9be66596a87e1cc04143d1f078520e3218e SHA-256: 701dcb031a757d999faafd111c23dbcb97637bd15d7d9fb3a687759713e962b2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains multiple heuristics indicating it is a phishing lure, specifically impersonating the 'Target' brand. It includes numerous external URLs, many of which are hosted on disposable domains or redirectors, designed to lead the user to a credential harvesting page. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/maxazupugafoxinu.pdf.
  • 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/award?keyword=how+to+start+money+exchange+business+in+australia PDF link annotation
    • http://mosebuzixat.mywebcommunity.org/lamogabulalowonaroda.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/maxazupugafoxinu.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/guzedaz.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/6f7b8f3.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/how_old_are_the_riveras.pdfIn PDF document text
    • https://rudarizegofuk.weebly.com/uploads/1/3/4/3/134355262/bemamonok.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/jjjbheH/jidumopojunitowugiwikoxob.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/windows_system_administrator_l2_interview_questions_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_6002796ac565c.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/71121726853.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/0ngc7k0/95450953250.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/hp_officejet_5745_color_ink.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwivazud.onlinewebshop.net/tawukifumekik.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/zenubikamibepiger.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/kojelixobufojonideguwubi.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/kenneth_e_hagin_healing_belongs_to_us.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/podovesavozadis.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_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 5576 bytes
SHA-256: 52151fe0d2cad3fc8f1e3169b1bffa45d5227547da366849d4990a7127eec000
font_01_sfnt_off0001158f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158F 10296 bytes
SHA-256: 912c5b9c4b686b19751b7c9e0e0a13b1c29fc9b1385f3eade5ca6c5fa3c5a588

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