Malicious PDF — malware analysis report

Static analysis result for SHA-256 c923fbb6f072196e…

MALICIOUS

PDF

91.8 KB Created: 2021-03-16 03:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 857c2581b60b1700165c752c714aa6b5 SHA-1: 1f4d62c1a340ade137ec95e07a2644bc5ef5593d SHA-256: c923fbb6f072196edef09fd0f2b68702bbd458e49b31a42715d7dec2c54e80a5
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, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with phishing, and the document body, though heavily obfuscated, contains keywords suggesting a lure for an award or prize. No scripts were extracted, but the PDF structure itself likely facilitates the redirection to the malicious URL.

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://zajinet.ru/award?keyword=experimento+avery+macleod+y+mccarty+pdf
    • https://leduxuma.weebly.com/uploads/1/3/2/8/132814900/2015032.pdf
    • https://tapogizixe.weebly.com/uploads/1/3/4/8/134897788/1978251.pdf
    • http://wijetaz.mypressonline.com/kingsman_the_golden_circle_full_movie_download_720p.pdf
    • https://koxijarekaze.weebly.com/uploads/1/3/5/3/135326688/lubipekiboj.pdf
    • https://static.s123-cdn-static.com/uploads/4470540/normal_600913f8d3dc1.pdf
    • http://art-practice.org/lawyer_authorization_letter_templateyuokk.pdf
    • https://cdn-cms.f-static.net/uploads/4495065/normal_604ae3afae6cd.pdf
    • https://cdn-cms.f-static.net/uploads/4371248/normal_6041d25fa3c7f.pdf
    • http://worelimupuvefam.mywebcommunity.org/the_crown_season_1_cast.pdf
    • https://pusobufuronuwu.weebly.com/uploads/1/3/4/4/134475569/wesil.pdf
    • http://hook-up.fun/sugelafozumodumave98p25.pdf
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/satozaze.pdf
    • http://tozaworewinox.mywebcommunity.org/ponuwutuni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/voropa/how_much_does_a_family_photoshoot_cost.pdf
    • http://tijadosib.epizy.com/dell_1320c_toner_reset.pdf
    • https://s3.amazonaws.com/sakaburepagase/new_english_words_meaning.pdf
    • http://nozosikela.rf.gd/what_is_the_grant_of_letters_of_administration.pdf
    • http://gafibis.epizy.com/basic_bms_system.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_off0001243d.bin
d244f2003af671c2e1b5ea8c6b0b2853a764eb3d191ed38829339fa3d485398d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1243D 5308 bytes
font_01_sfnt_off00013647.bin
02e7713f36b9b316850f9169bed02f9a0a987f3817fa2f135e4f93f5635d8e32
pdf-font-stream PDF embedded font (sfnt) at offset 0x13647 13020 bytes