Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad68af333a55c16a…

MALICIOUS

PDF

74.6 KB Created: 2021-03-07 02:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 90d533b0c91e5970a5fa721087ab6d65 SHA-1: 846adf3296866dab7cf3375532d2e4ba072dfe24 SHA-256: ad68af333a55c16af73cf8d34ab5a72c3ea98cf50d43f6c2fe434734f8911eef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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://ponafet.ru/wix?keyword=hayward+ec40+specs PDF link annotation
    • http://perfectiona.online/what_are_the_5_books_of_law_in_the_bible8vaxj.pdfIn PDF document text
    • http://tularafujebok.iblogger.org/slopes_of_parallel_and_perpendicular_lines_maze_worksheet_answers.pdfIn PDF document text
    • http://niwagiw.22web.org/whatsapp_status_saver_for_pc.pdfIn PDF document text
    • http://lepawumu.22web.org/honeywell_hz-709_oil_filled_radiator_heater_owners_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_600b073275226.pdfIn PDF document text
    • http://discout.online/new_romance_of_the_three_kingdoms_hack25sdb.pdfIn PDF document text
    • http://dkmz3.club/dogumalosebofowuxitimeka0dk1l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457011/normal_5ff4ed49acbd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418783/normal_5ffbe7def3e94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465125/normal_5fee2dd67fe15.pdfIn PDF document text
    • http://shimano-stradic.ru/89559114650g5m6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372361/normal_5ffeb5a5e014e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482863/normal_5ffa85e1b4dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_6022b00ab6268.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/62d288c4-2f24-4684-95a0-0eadcf00b580/fawabavovexenexifogozuvi.pdfIn PDF document text
    • http://tabukulazasidul.epizy.com/customer_service_assistant_job_description_resume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52517dd7-51c1-4447-9b26-24f8470a4e06/panefexoluwetobenivebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8020057d-c97f-4835-a186-bf38a04b646b/15644420761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665cadf0-ac72-409f-b3bb-c267fccb0c4e/is_the_canon_rebel_t3i_good_for_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeee433b-db5a-44ca-9385-ee8f4c1e12a4/74210397095.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_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 5420 bytes
SHA-256: ec053c4c1a0f467933e2e8a3496288ff9b060b586afb8b7f4e5213b8521a6f00
font_01_sfnt_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 14324 bytes
SHA-256: 73a3ec6742487edf5631d04fec627a9635b41f002b5ae79a61dcc4c41e7d292d

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