Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62f4d7c81e2c604…

MALICIOUS

PDF

85.3 KB Created: 2021-04-05 09:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 22c41b5821390b0010bb392d07505e2d SHA-1: 235fc068380eb74816a0ca68560c2bc0582735da SHA-256: c62f4d7c81e2c604bb87b187bd4ce9ab7fbc6625a2e1ebedd5d905de58eccfbe
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL and numerous other URLs extracted from the document suggest a phishing or credential harvesting attempt. The document body, though heavily obfuscated, contains text related to 'award' and 'tamil script letters', likely serving as a lure.

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://kuzutuzo.ru/award?keyword=tamil+script+letters+pdf PDF link annotation
    • https://cdn.sqhk.co/dekavaka/jjjcCYz/xokamamunanuragigegeja.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/4jebGwB/cute_skater_girl_hairstyles.pdfIn PDF document text
    • http://oneitstore.pro/75533333377hppd1.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/mjfL1hb/flight_release_dates_easyjet.pdfIn PDF document text
    • http://in-step.shop/labyrinth_lord_espaol5ud2w.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/jarn2he/commander_cody_helmet_stl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_604ca9fe062fd.pdfIn PDF document text
    • https://cdn.sqhk.co/fixefalid/heosFJ6/character_sheet_on_d_d_beyond_app.pdfIn PDF document text
    • http://shoop-fo.ru/60596484597fdp4c.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/wtzXOje/turning_circle_formula_at_anchor.pdfIn PDF document text
    • http://studyweb.site/predicaciones_adventistas_en_pptr4z26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_6035cd9405bdb.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/cchdFD9/37100394176.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/jggG1hb/56739007831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/5e_conjure_animals_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/what_does_the_rattlesnake_represent.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/52749822694.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/tipos_de_graficos.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/22149116057.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/are_volvo_expensive_to_maintain.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11250 5248 bytes
SHA-256: e13098da1bfa1310ef66fb86e45ec15c3316e1223b059c470f9d74c321f85c34
font_01_sfnt_off00012411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12411 10756 bytes
SHA-256: 02a21dfaca2a537f98e0e1624475737f812c873e6f6c8cfc71095222ce6b2eb2

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