Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f9460786950474…

MALICIOUS

PDF

80.9 KB Created: 2021-04-07 00:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 649b8af8dd1635a94fef17f61c3a355e SHA-1: a104238a7ec119dee3782658ff580c6a4441972d SHA-256: 20f9460786950474f8b5148df9b2ee426509d6c51e00cf9152693b75e92150db
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the presence of numerous external URLs suggests the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=reform+party+candidates+2019+mauritius
    • http://accface.in/373779316760pjud.pdf
    • https://cdn.sqhk.co/lupokuna/eyhbjiL/super_bin_adventure_world_1_remix.pdf
    • http://kononameve.mywebcommunity.org/national_geographic_magazine_november_2020.pdf
    • http://dutarotanazosuv.medianewsonline.com/cafta_certificate_of_origin.pdf
    • http://detonic-buy.website/rawexipobitog76yyh.pdf
    • http://boothattendant.com/how_to_keep_score_for_yahtzee9vgof.pdf
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/tubenaba.pdf
    • https://cdn.sqhk.co/toromerepowa/mcDWife/nonapokigutudeguwo.pdf
    • https://cdn.sqhk.co/gederanew/ficgecm/funko_pop_birds_of_prey.pdf
    • https://cdn.sqhk.co/godezixibufo/bVhbhjz/juxanuwaluluzuta.pdf
    • http://jovasetiveduza.scienceontheweb.net/kitesizuv.pdf
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/bivebalomupesuzowufa.pdf
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/5169604.pdf
    • http://difanitukovu.mywebcommunity.org/dubifuzovup.pdf
    • https://cdn.sqhk.co/jojipimuve/jfgiDfX/printable_iq_test_with_answers.pdf
    • http://wonozudobitisog.scienceontheweb.net/centrelink_medical_certificate_form.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://suxudogakol.myartsonline.com/beowulf_story_summary.pdf
    • http://najijojovigom.myartsonline.com/wusogekoxi.pdf
    • http://nabenejajoko.myartsonline.com/41221846673.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f822.bin
eec2bd4d71e95a6e290603f729052441df3c561bf1cef7369cb2bc078af6a7be
pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 5860 bytes
font_01_sfnt_off00010c08.bin
db9f95452752a1c00661e1e6820fbb8e3144accc809e927f9b57462fb242d567
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C08 12220 bytes