Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b553ef7f7b9893…

MALICIOUS

PDF

86.1 KB Created: 2021-03-15 21:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed9454adda18fb83bef4c384337748ac SHA-1: 4135f68ffc5ff089699814a6cfc64d170565795a SHA-256: 79b553ef7f7b98930c17bbd92e0961663b838824f150e33ef928000ad0ff3520
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that appears to be a search result for a game mod, suggesting a lure for users to download potentially malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/wix?keyword=empire+warriors+td+mod+apk+unlimited+gems
    • https://cdn.sqhk.co/kakapoxavu/xhiibib/lovuwirorefowinitizefiwov.pdf
    • http://milanbeach.fun/linolinejudir1cvq.pdf
    • http://123dutch.com/nikerls8ry.pdf
    • http://znatural.space/harry_potter_and_the_half_blood_prince_video_game_download9n5a5.pdf
    • http://nuraramibifowom.22web.org/gupawonidekosokuzemaz.pdf
    • http://dilijox.22web.org/herdmania_blood_vascular_system.pdf
    • https://cdn.sqhk.co/letonolomo/gjDKUie/nowoxuzerevomigo.pdf
    • http://novedexezenel.66ghz.com/belosokudaxalolo.pdf
    • http://woxagaxizi.22web.org/storytelling_books.pdf
    • http://godevibusaxinoj.22web.org/fewotofajojogekexabum.pdf
    • https://cdn.sqhk.co/xewazezikufi/jbctjaH/47646356295.pdf
    • http://pabukelib.66ghz.com/calcium_metabolism_in_human_body.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lekezaru/52597401271.pdf
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_c537b50032154faeab236aa46a29c76e.pdf?index=true
    • https://s3.amazonaws.com/xupizewuxere/rirapuraj.pdf
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_af8d828480b6446cb6ea75929626558d.pdf?index=true
    • http://dotofosamoge.rf.gd/wexemufuneripososiwapolit.pdf
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_20471068be924b179712b6d7f77c4ef5.pdf?index=true
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_78acc619d3d8485380847aac0b231473.pdf?index=true
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_86c18c6a9d8d452dbdecbb0a9c908eec.pdf?index=true
    • http://revupeponalewuj.epizy.com/ccleaner_pro_android_apk.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb8.bin
b8a0b7e1bc0b8294238dad4ae8399871715df4a1ea4940fd92eb8f8dd55ac2fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 5272 bytes
font_01_sfnt_off0001019c.bin
6fe79be0fb07b6dc6ee273355baa8f0dd2d4106e865b1cceb4cfb39a945c0078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1019C 11012 bytes
font_02_sfnt_off0001277b.bin
bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1277B 16060 bytes
font_03_sfnt_off00013c11.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C11 4324 bytes

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