Malicious PDF — malware analysis report

Static analysis result for SHA-256 f317a6d536de6652…

MALICIOUS

PDF

95.5 KB Created: 2021-04-27 19:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15b767fcfb9231c56ec02e584211c0c6 SHA-1: 6e69e96579a92dcadccaa78ecfbf8bd1e2b205d0 SHA-256: f317a6d536de6652704496748a9aa8534ca4d88cf151b62865ac5e57ad7422de
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, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely used to deliver a malicious payload or redirect users to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=asm+handbook+vol.+17+nde+pdf
    • https://static.s123-cdn-static.com/uploads/4407782/normal_6002c9e9b2034.pdf
    • https://cdn.sqhk.co/linewebozid/e9Sq4Zr/99625589995.pdf
    • http://natorg.fun/physics_for_global_scientists_and_engineers_volume_2_2nd_editionvxm3f.pdf
    • https://cdn.sqhk.co/pokivozu/iegfTHW/faded_easy_piano_sheet_music_with_letters.pdf
    • https://cdn.sqhk.co/vujixete/qgftsCB/air_combat_racing.pdf
    • https://cdn-cms.f-static.net/uploads/4490140/normal_606203a05c5db.pdf
    • http://barbanapoli.moscow/gofuwuwederuselutiwidl79ae.pdf
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fd72918a72a8.pdf
    • https://cdn.sqhk.co/lobitukojuro/R89tihE/jejapokepaserurametemoj.pdf
    • https://cdn.sqhk.co/baxajufim/jihchiv/18190661233.pdf
    • https://cdn.sqhk.co/farafakilof/g1hcehf/love_story_chords_g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jopokodex.rf.gd/46446052727.pdf
    • https://uploads.strikinglycdn.com/files/e94af8f8-8090-43b2-b0ad-6a207fc2a047/xobupirosiwidisexisedib.pdf
    • http://wajifinome.epizy.com/battle_royale_computer_game_no.pdf
    • http://resaruxowepu.epizy.com/introduction_to_statistical_learning_github.pdf
    • https://uploads.strikinglycdn.com/files/048b78b3-e0f0-4d14-88e2-546f992cad8d/burger_king_chicken_nuggets_deal_canada.pdf
    • https://uploads.strikinglycdn.com/files/389e4023-319f-4af3-ba39-eb9da6c8f801/86919978599.pdf
    • https://uploads.strikinglycdn.com/files/e44786e7-0f2f-4fe2-b3a6-0953db241648/health_and_safety_engineer_job_description.pdf
    • https://uploads.strikinglycdn.com/files/11f4f48c-3f3d-4172-9a4e-bab984615d48/10016685364.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013e70.bin
2ce6dbdc977b322c470163da7bf230138d82e61c2da707d4d4e9bc368788d0bd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13E70 28220 bytes
font_00_sfnt_off000104e0.bin
2b712a62fab913657e73d928427132ad1e7188d6e74194d2c9493a00bbb16365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E0 5604 bytes
font_01_sfnt_off000117d9.bin
90616e23ac31be29d6c7e0d9485f8f25a3448c8498af28ce13cf5c5520cef6e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117D9 11252 bytes

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