Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb860ec31b9c2351…

MALICIOUS

PDF

82.3 KB Created: 2021-04-03 09:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 053fd9049125f4893c9bb1a7394122c2 SHA-1: b906ab67c7fd8f93cb477692adfaaa50b5c30c44 SHA-256: eb860ec31b9c23519c22b80bd72cff4568a47cefd346f932f3a7606817c7a67b
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 multiple embedded URLs pointing to external domains, suggesting an attempt to redirect the user to malicious sites. The PDF structure and embedded URIs indicate a likely phishing or malware distribution attempt, consistent with Spearphishing Attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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/wix?keyword=holt+spanish+1+chapter+2+answer+key
    • https://cdn.sqhk.co/kokijunuxagi/iaiihbM/41450416328.pdf
    • http://skidki-day.store/40915288906cbhbv.pdf
    • http://mmamba.ru/zemirunikusev4tr8.pdf
    • https://cdn.sqhk.co/gixedomawa/gcPjctp/world_junior_hockey_championship_2016.pdf
    • http://imm-shoes2.club/58299753489io6d1.pdf
    • https://cdn.sqhk.co/nozelenid/5Yhcigs/11092164408.pdf
    • https://cdn.sqhk.co/voxobidivel/ifgfIib/45115971027.pdf
    • http://copyrightsafetyhelps.com/jowufomiteax9lg.pdf
    • https://cdn.sqhk.co/jemajujo/ijfhh4J/new_brain_test_tricky_puzzles_mod_apk.pdf
    • https://cdn.sqhk.co/toromerepowa/WzghBie/8297430742.pdf
    • http://fidenenaxemol.iblogger.org/apollo_twin_mk2_solo_review.pdf
    • https://cdn.sqhk.co/rekutadis/hgBggiE/jakenamotenemo.pdf
    • https://cdn.sqhk.co/vujenibolo/gjthenI/69252630394.pdf
    • http://legalvictory.group/43616535775eeo7y.pdf
    • https://cdn.sqhk.co/mogizilo/hgKhgju/anchor_printed_canvas_cross_stitch_kits.pdf
    • https://cdn.sqhk.co/kunimanujage/ijkXyL3/febegilobabu.pdf
    • https://cdn.sqhk.co/xibetevoxaj/hHjeIih/vufogubojanoka.pdf
    • https://cdn.sqhk.co/daborofus/jxGheed/worupotapakudoxidukoxixek.pdf
    • https://cdn.sqhk.co/vaxofalu/mO0mLQT/delete_cache_and_cookies_chrome_android.pdf
    • http://sonoxusa.iblogger.org/bungen_bei_bandscheibenvorfall_lws_4_5.pdf
    • https://cdn.sqhk.co/zezerixuwab/hmijcvx/26818926107.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nofalowi.rf.gd/jebuvakisetubosogonelefo.pdf
    • https://uploads.strikinglycdn.com/files/91c97baa-45e4-48af-a89b-e6e65841a8d6/powershot_pro_electric_stapler_manual.pdf
    • http://sinubazafapeni.rf.gd/acrobat_writer_windows_7.pdf
    • https://uploads.strikinglycdn.com/files/d2cf5861-28ee-4f11-becc-38f4849a5e6a/pibikobojiporoterapojusur.pdf
    • http://pokatutabojew.rf.gd/66916438376.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_off0000fe83.bin
2be818b7b6282bd8d68f17e070e883b6122303393f0fae3046f65bb2e6464a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE83 5424 bytes
font_01_sfnt_off00011109.bin
580f8f5663a68353254724870e56068caa84828653c2bf352866a3485fe0fd5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11109 12832 bytes

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