Malicious PDF — malware analysis report

Static analysis result for SHA-256 31587496b886e486…

MALICIOUS

PDF

73.7 KB Created: 2021-02-24 00:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9c9ec5a0829003aedd5a25b9d5402cfd SHA-1: 5ebbf5690d1a5e40018caafe037389fe360d1dae SHA-256: 31587496b886e486c2d5caa0864e42264ef742c3e6978c0fcdbcc75c6e2baad2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 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.
  • 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://druttle.ru/strik?utm_term=lateral+thinking+techniques+example PDF link annotation
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/xivuxukeduv.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/4829060.pdfIn PDF document text
    • http://dayzcommunity.info/rejunubopofeselndhr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_603414b84b2bb.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/ibIihVk/moxowexukonededepumuvet.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/TlV7ie9/nakalubakubupol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380692/normal_5fe01b9901a54.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/dinibizivexasufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_602644eaddb23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478947/normal_60357b8101470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_602228bd44ccf.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/5gfT157/97775283621.pdfIn PDF document text
    • http://eu-study.ru/92891599658w1byp.pdfIn PDF document text
    • https://daregunomunozo.weebly.com/uploads/1/3/4/7/134723938/xidupegakunafixapi.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/aBc9hek/87446946890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480899/normal_5fde25134f45d.pdfIn PDF document text
    • http://digtalcaliper09.xyz/ball_balance_game_download_for_pc40qpb.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/886418.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26C 5548 bytes
SHA-256: 29c195813ea45c2523521ee31dba7b238e499f23a09a12d0e1d32239aa6b5dd8
font_01_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 10808 bytes
SHA-256: 6016cffeca2b845649cab1fbf0ae7929b4f8a4a8fad8ade3c178653c5d9ca03e