Malicious PDF — malware analysis report

Static analysis result for SHA-256 2600c975e02afdcd…

MALICIOUS

PDF

235.6 KB Created: 2021-03-29 04:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5bb229bbcb97cac263c2fa7356f5b34 SHA-1: 9b31c3529a61a0733851181aad6eb3a40a8e1aef SHA-256: 2600c975e02afdcd89231c7fb8ec04e92bd14e5f850e27a203c84c8cf124e6c5
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 flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'botokaw.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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://botokaw.ru/award?keyword=2020+nfhs+baseball+rules+pdf
    • http://aycotoro5.xyz/dvoretskys_endgame_manual_drive13260.pdf
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fdff7954ffb2.pdf
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/1132050.pdf
    • https://static.s123-cdn-static.com/uploads/4462696/normal_5fc7a806eae8e.pdf
    • https://cdn.sqhk.co/gesafafo/gjgejcl/skater_skirt_dress_style.pdf
    • https://tuduzijusesuzi.weebly.com/uploads/1/3/1/4/131406801/rinuriza.pdf
    • https://cdn-cms.f-static.net/uploads/4418783/normal_602eb7d1416a7.pdf
    • https://cdn.sqhk.co/retakabif/axmp5HN/80107126915.pdf
    • https://cdn.sqhk.co/lowovegoxoji/gyJ8AU7/bolajanikaduj.pdf
    • https://cdn.sqhk.co/murevexi/d7icxgd/prison_escape_survival_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4453332/normal_6056802477649.pdf
    • https://static.s123-cdn-static.com/uploads/4446259/normal_5feb03b33500f.pdf
    • https://cdn.sqhk.co/ninubisidire/hdljb9A/knife_hit_boss_the_saw.pdf
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/9d52965.pdf
    • http://ijmalan.xyz/ponikefujj8aw.pdf
    • http://trikolor.site/939882430621i3wu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_e841cf03b25d4be6b50021e95bae1220.pdf?index=true
    • https://s3.amazonaws.com/werowibovezoje/nefopulimetusofemob.pdf
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_b2b807d0f42c4376899b3f511ab938fe.pdf?index=true
    • https://s3.amazonaws.com/sobaketemu/vezezukaxonemowosojozob.pdf
    • https://s3.amazonaws.com/lanorolowu/dna_replication_diagram_worksheet_answer_key.pdf
    • https://2a0daf8d-7d8f-48a8-9da6-1f2c606fcb3a.filesusr.com/ugd/adb9e1_ebd9c2283a224598899f4fc90d864223.pdf?index=true
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_06743f77f6844ced8f2a42d80e284dd8.pdf?index=true
    • https://s3.amazonaws.com/tiluwisulepam/baumatic_dishwasher_service_manual.pdf
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_46bd13b1a5ce4c279dd270fc777cb8f0.pdf?index=true
    • https://s3.amazonaws.com/bulikowexunepov/why_is_my_nextbook_stuck_on_startup_screen.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036423.bin
67a74d0024bc0607d41ab2e041f27c04b3974ed716451b610415e563cad940d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36423 5448 bytes
font_01_sfnt_off00037697.bin
24e14fcca3824dc7dfb3376db86f1ff70c38b3ca8b402a58e04a60df4dc75408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37697 12132 bytes

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