Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3da1f29eb696cf6…

MALICIOUS

PDF

73.8 KB Created: 2021-03-31 14:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ee9f93ed2bde6d17b842af5f30a32e2 SHA-1: 987d79de4821afda84fe4231c0491804db53e0c7 SHA-256: c3da1f29eb696cf6dd3ac40168bf91b0666369acfb71a6f72295345c321cf8ea
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'ponafet.ru', which is likely used to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to a 'cosplay guide'. No scripts were extracted, but the presence of external URLs and the nature of the detection suggest a phishing or malware distribution attempt.

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://ponafet.ru/123?utm_term=dbd+legion+cosplay+guide
    • https://jowatoziji.weebly.com/uploads/1/3/4/8/134893097/8632771.pdf
    • https://cdn.sqhk.co/pazibafax/gjOJicT/successful_parenting_secrets_by_nwosu_friday.pdf
    • http://pevazaw.mypressonline.com/glossaire_de_l_assurance.pdf
    • http://uscreditreport.info/learning_bayesian_networks_neapolitanjvpv8.pdf
    • https://cdn.sqhk.co/luwokiseg/jjaigic/6486872056.pdf
    • https://cdn-cms.f-static.net/uploads/4380090/normal_602b84e5e8732.pdf
    • https://cdn-cms.f-static.net/uploads/4414487/normal_6061caaf9594c.pdf
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fd7cf83bc2d6.pdf
    • https://cdn-cms.f-static.net/uploads/4444113/normal_600cd188ef4b2.pdf
    • https://niforowekid.weebly.com/uploads/1/3/1/4/131406966/jixovaginozoruloxanu.pdf
    • http://eushopvmn.site/59090547244pliw2.pdf
    • https://cdn.sqhk.co/xetilibul/dCj4GvA/boxing_starter_kit.pdf
    • https://static.s123-cdn-static.com/uploads/4499653/normal_5fca68f20a526.pdf
    • https://cdn.sqhk.co/jivonaxadu/GFebihJ/64156250343.pdf
    • http://kogowetek.getenjoyment.net/carlos_castaneda_don_juan_matus.pdf
    • http://mon-fortuneo.best/36592186606qamr5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tosabukevosubar.myartsonline.com/cbse_class_11_physics_syllabus_2020_19.pdf
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_8c319a5516684ffeae030c90972c663b.pdf?index=true
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_67b88eadcf3e46d69335cf88577d9d82.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d64d.bin
4f53acdd967c6abc1cc8e94aa37deb846baef61e83af78c3311dea8f4442051f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD64D 5384 bytes
font_01_sfnt_off0000e8b2.bin
b90db19c2f777b7dc0b707ba2317d3983e4e68eda5e0f6ca056e06946e48e157		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B2 2484 bytes
font_02_sfnt_off0000f350.bin
e9af5801ad151cecde410ddd1198db5c344dd4c8e0ddc002bece041d3df1b9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 11204 bytes

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