Malicious PDF — malware analysis report

Static analysis result for SHA-256 079232b4a72835a0…

MALICIOUS

PDF

73.1 KB Created: 2021-02-09 11:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 89aab5389b53ec6b798500233c235599 SHA-1: 60b76356649f4afddcd2236b31e41d359436f6c8 SHA-256: 079232b4a72835a084fc3c599cff07df61c42a2daa82d67469b9635d455a9cdd
126 Risk Score

Malware Insights

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

The PDF file contains numerous URLs pointing to disposable domains, many of which are disguised as software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the link farm heuristic suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/aws?utm_term=adobe+flash+player+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375908/normal_60064eee10f53.pdfIn PDF document text
    • http://yoga-italy.space/vafefivibubibegexefcg6o.pdfIn PDF document text
    • http://digitalmedialit.com/bahubali_2_cinema_moviek6dhc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377095/normal_5fdf117524319.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/ijTsa6S/vasirupumunuvamesubi.pdfIn PDF document text
    • http://1freedom.space/cocineros_argentinos_receita_de_budi57e7n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_601de8939a5b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_600bc4999d162.pdfIn PDF document text
    • https://cdn.sqhk.co/dowufagit/etggYha/19425677389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5febd7de2326d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455673/normal_5ff7ccbbaae92.pdfIn PDF document text
    • https://cdn.sqhk.co/fabupiguboxa/ihiazNv/live_football_tv_euro_para_pc.pdfIn PDF document text
    • http://coloradocustomelectric.com/imo_answer_key_2015_set_bff4vy.pdfIn PDF document text
    • https://cdn.sqhk.co/xujifomevesa/i5chfkc/merchants_auto_inventory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_6018c2b6528bf.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/wibedubosateg/25445098812.pdfIn PDF document text
    • http://beverotunege.epizy.com/ratelamaziwu.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/parts_of_speech_worksheets_with_answers.pdfIn PDF document text
    • http://jaraduvexuzufe.epizy.com/kemakig.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/mowigo.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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 5556 bytes
SHA-256: 3d0ab78603a2e07be23da63571cc2d4c289e6c324eeb7f46c0dacd55d67a91e5
font_01_sfnt_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 10468 bytes
SHA-256: 6ae38450ff10188559188cd4966f46c6a33c3f3b7b2fc7882dd1f4010f02ce40

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