Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe4979bf3e8ac30…

MALICIOUS

PDF

84.2 KB Created: 2021-03-16 23:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0f89b597238344f6467f00ed83c5f688 SHA-1: f1f2b676d61b0c7f6cce0adb3aefff5e7b9169ca SHA-256: afe4979bf3e8ac30de91580ba40cdf81aebff50a0a57d24b815cdc1640d6e2d4
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs, with a primary external URI pointing to 'https://vilenefex.ru/123?utm_term=sample+template+for+inventory+system', suggesting an attempt to redirect users to a potentially harmful site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for multiple links, reinforcing the phishing intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/123?utm_term=sample+template+for+inventory+system PDF link annotation
    • https://cdn.sqhk.co/norowitidot/gdtgfWX/femojuwezire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_6023c87ae01d9.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/ij0jiUJ/worms_3d_gamecube_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_600bfd27aa3ca.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/2ghhdhe/best_ringtones_2019_download_tamil_bgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_602a9e108e2eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_603566e14498f.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/eZhbrm7/39423608109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fd0bc7eeeadd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_602c4fce54048.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/cvziicf/void_tyrant_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e3a2ba25-b1c3-44f1-afd0-2422e3e74772/persuasive_essay_example_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a38caf8-f9e4-437c-9fab-63fd3c32cdcd/how_to_do_enthalpy_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53230013-870e-4094-bee4-daab15583cff/ti30xa_calculator_manual.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_91213a87ea394e80b7dcb28902314c8f.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_2934963cbad94a6c8f9fcda00d90db56.pdf?index=trueIn PDF document text
    • https://69f7c7ec-f776-4f8b-90c4-e8126cd531e3.filesusr.com/ugd/772020_7ad12dc7258f4ad79d42ffc63400b426.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc869b7-a51e-4a3c-b954-99a1bd780bfd/si_quieres_caminar_sobre_las_aguas.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/64323179598.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/polaroid_300_film_walmart.pdfIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_2fbc51ec96be46578fc057fbd393cb7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/celebrity_answering_machine_greetings.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/34273795473.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/titan_440_airless_paint_sprayer_for_sale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 5100 bytes
SHA-256: 4a60f81bb647fe8e0a137c3e83b8a9cc76d26134603efc983f3ec461bf51ba0c
font_01_sfnt_off00010e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 10928 bytes
SHA-256: 8093b63b2d61a9ab4dadc53d47a197dfb7231b0df9527373e003c0d29cf3fb33
font_02_sfnt_off0001337a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333