Malicious PDF — malware analysis report

Static analysis result for SHA-256 643022a05a20feba…

MALICIOUS

PDF

75.4 KB Created: 2021-03-12 16:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ba28d828263f9d717d5753ac2c70c1db SHA-1: 20373c04c107fcb97a289ff59611f17f81364915 SHA-256: 643022a05a20feba5570bcac8bb68d6b072e55e3989693ff4d17742949f703b7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to disposable hosting, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to a 'guide', reinforcing the lure aspect. The embedded URLs are likely used to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=loz+link%2527s+awakening+switch+guide PDF link annotation
    • http://remont-kvartir-otzyvy.moscow/30267170127s2ntr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482009/normal_5fc591ab1c392.pdfIn PDF document text
    • http://datulosuwila.iblogger.org/walexagiwinexolesit.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/viiifjh/23208137013.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/qhuu1jg/the_kitchen_chicken_meatloaf_sheet_pan.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/Ziaj5hi/gezopunifetojited.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/ijqijmR/mi_launcher_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482645/normal_5ff78179d9526.pdfIn PDF document text
    • http://centerverifybadge.com/724863974751tx7y.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/B7aihge/43415064532.pdfIn PDF document text
    • http://nefuzixitelu.iblogger.org/tkb_guru_agama_islam.pdfIn PDF document text
    • http://50offit.pro/30594506209ht3sa.pdfIn PDF document text
    • http://abzac.me/your_choice_restaurant_menuw7ht8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388827/normal_5fcf66562b860.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_eeb5d33685854e9ba7ea1c14c0eead3b.pdf?index=trueIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_c1dec149a5224ec3bd1ccdb93da6b680.pdf?index=trueIn PDF document text
    • http://pigibotokaper.epizy.com/70913788943.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/bobegazikugu.pdfIn PDF document text
    • http://nabesazuxipuf.epizy.com/xunitusabofuxudadapo.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/45674021765.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/gadesebimoterowuzafuj.pdfIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_a73c09981adb43fb92d4515c15b003d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/50832737726.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_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 5284 bytes
SHA-256: 7fd8e6c9dc87852a977dd6cfe1452ad3425983cdb934ae6d450d7c5a99ab7d97
font_01_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 10772 bytes
SHA-256: 9317908f4f85c7f3ebe817026341f311e5f80c9df13b8b8a5e40ea932bc8a719

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