Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a91c497ccf1f47…

MALICIOUS

PDF

74.0 KB Created: 2021-03-28 17:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea28abe5aa6e554a28ff85346a82417 SHA-1: d59df175e7fad2fed77177faa4d318ca2b6794ce SHA-256: 73a91c497ccf1f4799a13ef8afc18350306da7604d1bc40aeb8b6005bb549f27
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that appears to be part of a phishing campaign, attempting to impersonate a legitimate service. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/award?keyword=adobe+acrobat+convert+scanned+pdf+to+text
    • https://jeletizasi.weebly.com/uploads/1/3/4/6/134640559/dd1d5.pdf
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fd044b69eb80.pdf
    • http://dakajak.medianewsonline.com/contrato_de_arrendamiento_en_ingles.pdf
    • https://cdn-cms.f-static.net/uploads/4368953/normal_603306ea56098.pdf
    • https://cdn-cms.f-static.net/uploads/4498376/normal_6032e3411df41.pdf
    • https://static.s123-cdn-static.com/uploads/4446152/normal_5fedf0c39ccd2.pdf
    • https://sujixiku.weebly.com/uploads/1/3/0/7/130739139/fed268c54.pdf
    • https://cdn.sqhk.co/gosukutusu/eijPrja/saladubarosagaz.pdf
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fe267c8bdc04.pdf
    • https://cdn.sqhk.co/kesufetumo/bZjiUCs/tezuresevebano.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tijuvewoduga.onlinewebshop.net/34983063893.pdf
    • http://benamow.myartsonline.com/what_is_breach_notification_rule.pdf
    • http://pufiwuwa.epizy.com/best_scrabble_game_for_pc_free.pdf
    • http://lakekawe.rf.gd/dialysis_machine_working.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_off0000e451.bin
69ed82c9fc5c6116fdfd62ce5b7e9c526e857d8859c186eb7ac1a5648c075dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 5376 bytes
font_01_sfnt_off0000f6af.bin
c318d98511daa171c0d09e2c022d5ccf5a36b827a70b4f65fa870bf675aafddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 10744 bytes

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