Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1ad0d7246af6f7…

MALICIOUS

PDF

72.8 KB Created: 2021-06-01 17:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 60b9a21c43d640f139aabaa31cdb1f33 SHA-1: b01b8d443da1f1ceeeeaf232949e660a9edc529f SHA-256: 3d1ad0d7246af6f7f5bb5ad5c37daf6413b01f1e8f9c7f5124a665ef3f307c03
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains an embedded URI pointing to 'crysiq.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily corrupted, suggests a lure related to financial calculations, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://crysiq.ru/pbw?utm_term=how+to+calculate+final+salary+pension+lump+sum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474456/normal_603181b00b40d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459477/normal_5ff8c331cd2a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_601df6d8a3e45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_604890a8b5217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7340572e-3f97-4ab9-a740-33e5a7206ffa/46186938510.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/f/zozefesilubiwojitiwuvan.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/un_decametro_cuadrado_cuantos_milimetros_cuadrados_tiene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a72d32-f93c-4d0b-9807-523081332939/dell_latitude_e6410_wifi_drivers_windows_7_32_bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f3297a-95ba-489d-8ad6-bf0a0dd96fa0/2016_hyundai_sonata_hybrid_owners_manual.pdfIn PDF document text
    • http://garigor.pbworks.com/f/14402404478.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144413820/15093929695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324afb29-0043-4eac-88db-2574f966ac93/debub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379d41de-ea11-4b3c-998f-cc7d38ac07bf/why_is_my_ge_fridge_not_making_ice.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/42944238781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5fb5b6-8aed-48dc-8eae-f51ac71590ca/13637567536.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144426765/world_coin_price_guide.pdfIn PDF document text
    • http://pojaweku.pbworks.com/w/file/fetch/144464130/defavekifidepu.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/39520703324.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/w/file/fetch/144432426/52135393375.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144439710/how_to_make_a_knex_tank.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/f/libro_de_nanda_nic_noc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab9ade75-797e-4a79-99b3-8367285f9330/88742072669.pdfIn PDF document text
    • http://sewafebi.pbworks.com/f/bixidufed.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_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 5316 bytes
SHA-256: 3e2681e1cd3ca3eeeb5cc20717172dafa72781150715fdac36143cf946ec6423
font_01_sfnt_off0000f056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF056 10900 bytes
SHA-256: ea2218140a3af3f8b527a8e3212ad08f755403568bfa4a24ec515a32a640b9f8

Open this report in the interactive analyzer, or submit your own file for analysis.