Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ece0f1e45b1e9a…

MALICIOUS

PDF

80.8 KB Created: 2021-04-02 06:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a63fb7cc7a2437819e1955eb7e5a320 SHA-1: 1801a6b3f76f7c4a7d81a099ccca728dd34d2007 SHA-256: 12ece0f1e45b1e9aaf68b0cf816d03cdf1193382bab2a91bbd6df0b5207b6b06
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. The document body, though heavily obfuscated, suggests a lure related to educational materials, likely to trick users into visiting the malicious URL for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/wix?keyword=forming+and+naming+binary+ionic+compounds+practice+worksheet+answers
    • https://cdn.sqhk.co/xelajuwodaf/gQ7Hjcf/63230829077.pdf
    • https://cdn.sqhk.co/dudugetogi/O6Hhc2U/zojarasipijanes.pdf
    • https://cdn.sqhk.co/romafime/fhgjfii/25992621250.pdf
    • https://cdn.sqhk.co/kigaratak/bEDMg3Y/14698581784.pdf
    • https://cdn.sqhk.co/libavesonon/2lAhicT/sniper_3d_strike_fps_gun_shooter_game.pdf
    • https://cdn.sqhk.co/kuretunaba/zriahgg/37613424980.pdf
    • http://pivogafude.22web.org/game_of_life_rules_salary_cards.pdf
    • https://cdn.sqhk.co/fovomesit/Iiigahe/41238123676.pdf
    • https://cdn.sqhk.co/fivufotimad/elFijih/grade_four_worksheets.pdf
    • https://cdn.sqhk.co/jigugabopu/bie7rhf/football_champions_league_2019_live.pdf
    • https://cdn.sqhk.co/besiwowegin/i1zfouD/ice_crushing_blender.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mubefula/94106335382.pdf
    • https://s3.amazonaws.com/fukepez/65203353375.pdf
    • http://vobulag.rf.gd/java_10_jdk_mac.pdf
    • https://s3.amazonaws.com/novipaliwid/ace_personal_trainer_exam_price.pdf
    • https://s3.amazonaws.com/jujojomojemiz/baker_s_crust_nutritional_information.pdf
    • https://s3.amazonaws.com/bevarolimesale/8262853163.pdf
    • http://dibimagawedifik.epizy.com/navuwasipadel.pdf
    • https://s3.amazonaws.com/xukanomarexumu/3528783703.pdf
    • https://s3.amazonaws.com/rurovikejigibu/rojive.pdf
    • https://s3.amazonaws.com/gonima/gilinudabo.pdf
    • https://s3.amazonaws.com/nisoxow/jfet_transistor_questions_and_answers.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_off0000e7a8.bin
f903ab4386cb4bb65517607ba2fd398075f02f23a4c27246f38031960cc29a93
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 5808 bytes
font_01_sfnt_off0000fb59.bin
e371fc94fdb0a5273ab9a7b9afe871007b85303f6a681443538fe35ede6c442b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 10536 bytes
font_02_sfnt_off00011f5c.bin
2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5C 16140 bytes