Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99c1840497862e8…

MALICIOUS

PDF

86.4 KB Created: 2021-04-04 19:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e5f1590bd210a9c1363e3b10f7750bb SHA-1: de9ed6ac2546652beecc20f2c13a1bb6708ae3d1 SHA-256: d99c1840497862e8a70b37570faf5f0772db7460620783de1d7a04480273d48a
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The document body, though heavily obfuscated, suggests a lure related to scientific material, specifically "Hydrogenation of benzene pdf".

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://golowaki.ru/123?utm_term=hydrogenation+of+benzene+pdf
    • https://cdn.sqhk.co/sifajoxojif/Ilidjft/xapenefikuraruzagevo.pdf
    • http://net-klientov.ru/58497619792y92fk.pdf
    • https://cdn.sqhk.co/vafexifere/huIjdg8/voltage_transformer_rating.pdf
    • https://cdn.sqhk.co/binebelezux/ehggclf/pulsar_music_player_pro_1._9._9_apk.pdf
    • https://cdn.sqhk.co/badilapo/lJ54jaT/sudajasanojafigikow.pdf
    • https://cdn.sqhk.co/kakapoxavu/qFgigiI/star_wars_dark_legends.pdf
    • https://cdn.sqhk.co/badalozebale/dOjxygd/99765240831.pdf
    • https://cdn.sqhk.co/luwagoma/hahasie/71879219198.pdf
    • http://hdvideo.design/pioneer_hpm_60fbqkv.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • https://cdn.sqhk.co/mikakiraw/cojjjhb/74170840635.pdf
    • https://cdn.sqhk.co/donuvoduvedo/ehhMjhp/kafatadukabanekupijixi.pdf
    • http://appletopshop.ru/nafubimiwosesujotaxowtvh5t.pdf
    • http://birjand.design/braun_coffee_maker_kf7170_e01qooke.pdf
    • http://ravigimojamel.mypressonline.com/best_agatha_christie_books_for_young_readers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rezumasalimod.epizy.com/credit_report_dispute_form.pdf
    • http://vedixemalirugi.atwebpages.com/brainstorming_teaching_method.pdf
    • http://jijutapomu.rf.gd/mugud.pdf
    • http://mevusajilitum.rf.gd/kingdoms_and_castles_achievement_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf9.bin
5539693d3c85b7c8540b19bac120f4eca3bd892e2784f497c6a6b953e474fb9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 5252 bytes
font_01_sfnt_off00010df4.bin
7277d11a4baca51155213743a79ee0ab17a8bb86ebd57d5c7c9c9395550cc0bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 12028 bytes
font_02_sfnt_off00013716.bin
83403b8fa8dccb90e43339ddb7acc758b5f42ecc1636a668cb1c81ec0405a676
pdf-font-stream PDF embedded font (sfnt) at offset 0x13716 16124 bytes