Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82b6d6aaa2fabff…

MALICIOUS

PDF

78.8 KB Created: 2021-03-25 15:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5b3944e74f51e77cfe28ddd14990c89 SHA-1: afb28819391a0a36b870e264edfc47c2f99b9da9 SHA-256: d82b6d6aaa2fabff1b41a68ca0b476798bada64dc7a3321cd478706107d068dd
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a malicious domain, identified by both heuristics and ClamAV detection. The document body, though heavily obfuscated, contains text related to "anaxonic neuron function" and the authoring application, suggesting a lure to disguise the malicious intent. The presence of an external URI and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/wix?keyword=anaxonic+neuron+function
    • http://bioforce-co.site/654312768076z3zy.pdf
    • http://dibowofu.22web.org/pemizofisomefiwixumojod.pdf
    • https://cdn-cms.f-static.net/uploads/4424982/normal_604b614d2e212.pdf
    • http://naturalgood.space/how_much_does_it_cost_to_replace_a_mini_cooper_transmissionnyu8c.pdf
    • https://cdn-cms.f-static.net/uploads/4485436/normal_6043787d6bd85.pdf
    • https://cdn.sqhk.co/derepinejabi/nEidLii/red_robin_coupons_august.pdf
    • https://cdn.sqhk.co/togodawexu/l4idK2P/extreme_full_driving_simulator_apk.pdf
    • https://cdn.sqhk.co/bilexodofose/iuFa9jc/fozudevakidetekadusuwovi.pdf
    • http://gopuderolan.iblogger.org/which_is_better_graco_4ever_vs_extend2fit.pdf
    • https://cdn-cms.f-static.net/uploads/4406466/normal_603a78586a463.pdf
    • https://cdn.sqhk.co/vopupevomate/gjbichf/nowumixi.pdf
    • https://static.s123-cdn-static.com/uploads/4489969/normal_5fca16e107d54.pdf
    • https://static.s123-cdn-static.com/uploads/4414696/normal_5fe4d85bc83e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pefijolal.rf.gd/principles_of_physics_halliday_resnick_walker_10th_edition.pdf
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_7824c77b165e426c946bbc4ad0b04871.pdf?index=true
    • http://vuwotona.epizy.com/artigo_299_do_regulamento_do_imposto_de_renda_decreto_3000_99.pdf
    • https://17d0eb04-815e-47ed-958d-2ea761acaaf9.filesusr.com/ugd/607883_5e23cc3a732a48af874e4f961ffe8818.pdf?index=true
    • http://nositejijo.epizy.com/togilolifewirixifowoz.pdf
    • http://zegorekezape.rf.gd/how_to_change_battery_in_reizen_talking_watch.pdf
    • http://sezovij.rf.gd/algernon_blackwood_the_wendigo.pdf
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_3147d8a3e5184cb4b552f23dca99a2a5.pdf?index=true
    • http://zinizar.rf.gd/56349996593.pdf
    • http://mejavifoxeb.rf.gd/48358891729.pdf
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_687f408567d4402384a18d8bf6a77dd9.pdf?index=true
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_7127d86f3b6b4aa0a0bae804bdc9fadb.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_off0000e807.bin
e00392f7e4255aeceb08e230a9bb85fc8821631878956959f29106f2e87f1b49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 4604 bytes
font_01_sfnt_off0000f7b7.bin
605bc87a2b5605039770f907b7a4d7dad711872c4980e9057175e9580c47f071		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 11660 bytes
font_02_sfnt_off00011f5e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5E 4324 bytes

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