Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b67b49234f6b2c8…

MALICIOUS

PDF

70.5 KB Created: 2021-02-10 01:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f98d8345f580ba0e382162c3cd5b55f1 SHA-1: a7667365809839142b2964f5e539eba394354c26 SHA-256: 3b67b49234f6b2c8a85988415023e9c9ab2db9b526c97da65e5e3ba149f9192b
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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://baarspo.ru/wb?keyword=beginning%20sound%20worksheets%20for%20kindergarten PDF link annotation
    • https://latimemoniborij.weebly.com/uploads/1/3/1/4/131437487/0cff55fbd054.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/6ifiggj/bigfoot_hunter_apk_mod.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/1165360194149s7n.pdfIn PDF document text
    • https://cdn.sqhk.co/jigidokasaga/hjajAii/90_day_fiance_the_other_way_song_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/fHkLTs1/rorubamabopa.pdfIn PDF document text
    • http://lozajakar.iblogger.org/vibunoxividelitoxurukos.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/8JABzjh/hand_tossed_vs_stuffed_crust_at_pizza_hut.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/vgdgjEU/gesupikabagujogeveviku.pdfIn PDF document text
    • http://fdvsefwfrw.space/colliers_minneapolis_industrial_reportwvw3k.pdfIn PDF document text
    • http://potolkilife.ru/giriwibemop75b7.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/jipowumat/batman_arkham_knight_guide_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/65989950610.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/extra_deep_pocket_king_size_fitted_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/fabozoriruwufosubudelo.pdfIn PDF document text
    • http://sijopar.epizy.com/apics_cscp_learning_system_2017.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_off0000d4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F2 5340 bytes
SHA-256: f565a2d55b1da235d624912855a9427efdcaf9e0e413caac42cb5fd251048a54
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 11136 bytes
SHA-256: 3803732d4ac778254ac354ea070259216662ff2d31a271715bed9659012d0287

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