Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9a1ad3d9afb57a…

MALICIOUS

PDF

96.4 KB Created: 2021-04-13 00:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6be7feedfa6da610c449dca86616731b SHA-1: 2877ef4b285cbf796de7ff8bf622e9c8ac04ca2d SHA-256: ac9a1ad3d9afb57a23004b09c58b25bd0e4cff3a6fa9097b8e7abfc4d8541595
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, indicating a high probability of malicious intent. The presence of an external URI pointing to 'jacksth.ru' suggests the document is designed to redirect users to a potentially harmful site. Although no scripts were explicitly extracted, the PDF format and the nature of the URL suggest it may leverage embedded JavaScript for malicious actions, such as phishing or downloading further payloads.

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://jacksth.ru/strik?utm_term=wolf+of+wall+street+meme+throwing+money
    • https://cdn.sqhk.co/zupodejadofe/hjShfhf/deacon_hill_rivals.pdf
    • https://cdn.sqhk.co/baxorurifina/hhdjfji/60322789507.pdf
    • https://cdn-cms.f-static.net/uploads/4383132/normal_6028e3647dd62.pdf
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5ff6940f939a8.pdf
    • https://cdn.sqhk.co/xorilulog/JFjbojj/82488557934.pdf
    • http://tugrull.com/93815746758ppm5w.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://akmurzina.com/11456662388rt1xh.pdf
    • https://cdn-cms.f-static.net/uploads/4483870/normal_605581318ba6a.pdf
    • https://cdn.sqhk.co/buzomesil/ifhimvy/power_rangers_super_ninja_steel_gold_costume.pdf
    • https://cdn.sqhk.co/fetumamuv/cSgjhLj/asos_ski_jumpsuit_review.pdf
    • https://static.s123-cdn-static.com/uploads/4450640/normal_5febf5b92271f.pdf
    • https://cdn.sqhk.co/wowedofu/ehjiage/54602150568.pdf
    • https://cdn-cms.f-static.net/uploads/4474192/normal_6035304422895.pdf
    • http://lenudes.com/robot_vs_zombies_game_unlimited_money8qx62.pdf
    • https://cdn-cms.f-static.net/uploads/4383678/normal_6010809d0b7f2.pdf
    • https://static.s123-cdn-static.com/uploads/4484805/normal_5feb08bc0fd1f.pdf
    • http://alexsaf.ru/can_i_buy_adobe_premiere_pro_without_subscription3xly6.pdf
    • https://cdn.sqhk.co/ranamifujuki/b7xBjc0/vavadizubug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off00013821.bin
866fde5aaf339bdbf5f6a9b18ef76b79310385e8e0f852ebefb779a30b5d4df4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13821 5388 bytes
font_01_sfnt_off00014a6b.bin
f06b06ac9fd82d96039d030f8318dfc6e00a25c6b31588e8f28b62b738efa4d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6B 12440 bytes