Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d72a194d1ac5def…

MALICIOUS

PDF

82.0 KB Created: 2021-03-23 10:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1bcc01d4b29a484bf788b52d4f5067 SHA-1: 6b27c7f5ded2579c428db64f14dd31eadd45e2ef SHA-256: 0d72a194d1ac5def08f13307b1828f379abd85c29376d08a3d14018c83067ed8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('ponafet.ru') that is likely part of a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, suggests a lure related to partnership agreements, which is a common tactic for phishing and scam operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=50+50+partnership+agreement+template+pdf
    • https://cdn-cms.f-static.net/uploads/4418566/normal_604a2c2e60b4f.pdf
    • https://cdn-cms.f-static.net/uploads/4485445/normal_600a18ab93995.pdf
    • https://static.s123-cdn-static.com/uploads/4455399/normal_6006a37d7c480.pdf
    • https://cdn.sqhk.co/vuvupewog/4eliexD/black_friday_laptop_deals_2019_walmart.pdf
    • https://cdn.sqhk.co/gukokefa/hf90nCy/stickman_rope_hero_2_mod_apk_android_1.pdf
    • https://cdn-cms.f-static.net/uploads/4424696/normal_604005c6531e4.pdf
    • https://cdn.sqhk.co/kawaxixe/oieciem/chronic_urticaria_guidelines_eaaci.pdf
    • https://static.s123-cdn-static.com/uploads/4418001/normal_5fc95ca3a30c8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a191e440-3f13-4c80-9fe5-e10a524bf553/how_to_reset_frigidaire_window_air_conditioner.pdf
    • https://s3.amazonaws.com/paropabaru/osrs_slayer_guide_beginners.pdf
    • https://s3.amazonaws.com/falevi/49915654677.pdf
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_c44951d28d50412499f1ea484b02a2a8.pdf?index=true
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_2ea0a36257d848eda6d59ea3c642d31d.pdf?index=true
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_6e647866a3af4726ac037e20e6b3f985.pdf?index=true
    • https://s3.amazonaws.com/sugosubexez/84901190705.pdf
    • https://s3.amazonaws.com/wupixufekijax/malayalam_movies_free_website.pdf
    • https://s3.amazonaws.com/xozeb/vudesajamov.pdf
    • https://uploads.strikinglycdn.com/files/25063ab5-2f8d-4688-a15a-7b602533fec3/gibolom.pdf
    • https://183cab0c-2e2b-44e6-b55a-0f82cb58e578.filesusr.com/ugd/133137_b7c91bb5995e4606aead87dcabc106d2.pdf?index=true
    • 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_off0001023c.bin
d1ae9b9278ff64e27396a8f965ae96572698a8c05cd9665bde5d92836eb541ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023C 5624 bytes
font_01_sfnt_off00011533.bin
57b983bb3ab7a1c1c46293cd32b1a00c6201863a2913c68e3596367273574a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 10844 bytes

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