Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a69e87510148da…

MALICIOUS

PDF

68.7 KB Created: 2021-04-01 20:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2d0ed7baaced22cf573d7a041216ca2e SHA-1: e945436c1cde49c4a369a6033efbea7c26d6a7be SHA-256: 34a69e87510148daa47b33f62f2c6219d51c95a060a5038a8465f12fdbdb99e8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to seemingly unrelated PDF documents, indicating a link farm. The primary URL, https://baarspo.ru/strik, is suspicious and likely leads to malicious content or spam. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://baarspo.ru/strik?utm_term=how+to+use+timex+indiglo+thermometer PDF link annotation
    • https://cdn.sqhk.co/dagozuwemep/ihheesq/88439560764.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/7395959.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/logowigasiboxexon.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/ibO2jfq/jegatokapusiwawone.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/iejidn0/project_management_tool_software_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/agjiZjb/73681887954.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/bBuNeTh/11573235407.pdfIn PDF document text
    • https://daxejinuvu.weebly.com/uploads/1/3/4/6/134645798/gupinuvez.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/GLH8ihz/vexation_definition_past_tense.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/goF1ifW/parkour_the_office_animals.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/hejiggF/93065318105.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/awBja2e/42988501090.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/daxaxeledexa_jibed.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/ghijZjj/pixel_rope_endless_rope_swing_hooks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/39493648058.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/logid.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/dikamamuvulojiwenikafe.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/muwutugalojudesubukamifob.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/fikagofatesoxomuwir.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/guide_du_routard_israel_jerusalem.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/64928457362.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/sepsis_shock_guidelines_2018.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_off0000cedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDF 5148 bytes
SHA-256: 53e7d5e71e3f535d3ab85b8dfba18513c2cdbe456c5833b3a9fc4e12514cb7de
font_01_sfnt_off0000e046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE046 10856 bytes
SHA-256: 5b264fb57392a4eee910269512f8b265985c3c5c26edd8dce5248cf6df0bbdd1

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