Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49764e79e60336a…

MALICIOUS

PDF

123.0 KB Created: 2021-06-29 06:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02fead408f62812c3d3b24330201f212 SHA-1: a416c9e46def8a5e87a454bf8baae3d7878a0b06 SHA-256: e49764e79e60336abb788d89baaa0d177b52f5698df25fc67650c5b6ae0c7866
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to zajinet.ru, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wb?keyword=the%20importance%20of%20being%20earnest%20quotes%20act%201
    • https://xidatebomi.weebly.com/uploads/1/3/5/3/135326438/054dab3a3410d.pdf
    • https://morewunopidov.weebly.com/uploads/1/3/4/8/134895133/bamafukeneludi_bepidu.pdf
    • https://pufoviram.weebly.com/uploads/1/3/4/5/134580195/tarotetodaku.pdf
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/xusexebegogaruwu.pdf
    • https://zizopozuwugova.weebly.com/uploads/1/3/0/7/130775786/3552456.pdf
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/tuwajate.pdf
    • https://roralolew.weebly.com/uploads/1/3/0/7/130775143/juzupagetudamap.pdf
    • https://mosodufenu.weebly.com/uploads/1/3/4/8/134889918/bikapilozak_javetedonafe_xakojaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d53ce068-df06-4d3d-91c4-1ba53bff6f89/how_to_clean_a_zojirushi_hot_water_dispenser.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60cd24b22a1ec1090d1e7bbb/1624057010398/substance_painter_texture_set_list.pdf
    • https://uploads.strikinglycdn.com/files/2b20170e-23d4-45b9-91be-a11ee4bb6752/goat_simulator_payday_all_trophy_locations.pdf
    • https://static1.squarespace.com/static/60bf6c6a79613f649bb1d090/t/60cc7d20090ef86c08b02ad7/1624014112687/prison_empire_tycoon_mod.pdf
    • https://uploads.strikinglycdn.com/files/ae8269cd-a810-45ac-ad12-359777fe1ba3/pivubakadaravuj.pdf
    • https://uploads.strikinglycdn.com/files/66815851-0a86-4e50-9466-a84deebfc8e1/mifareg.pdf
    • https://uploads.strikinglycdn.com/files/bb998526-d296-4d3e-ae52-5d7a6160f771/subway_surfers_singapore_hack_download_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/c982af80-99dc-42f6-8c3a-69e75d93767b/mizemudoxok.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a23e.bin
86d1a23bd3a0bc06266c3091603d324951d006278e4a4eb9cb0659fe91f5a47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A23E 5664 bytes
font_01_sfnt_off0001b555.bin
32aa278e88078fc326d4924eefd41ccbbf4e955294acbedb03d6b5bffe8bc39e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B555 12032 bytes

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