Malicious PDF — malware analysis report

Static analysis result for SHA-256 41853960be68597d…

MALICIOUS

PDF

76.5 KB Created: 2021-03-11 07:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cc93c5135d9010fa83a7412f5cd684a SHA-1: 4912eff25508d9e910974b17566a41fc51d5bc3b SHA-256: 41853960be68597d97907ad51a014145dd242f0e18e54eb33aed1c4db36de123
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The PDF structure and embedded URI suggest an attempt to deliver a malicious payload or phish for credentials.

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=armattan+rooster+manual
    • https://cdn.sqhk.co/ripalufix/E8hdWP9/jodiv.pdf
    • https://legufita.weebly.com/uploads/1/3/4/8/134866723/wogev.pdf
    • https://cdn-cms.f-static.net/uploads/4413235/normal_601411dfb27dd.pdf
    • https://cdn.sqhk.co/waxoxewanuvi/uibvZBb/wells_fargo_mobile_app_login.pdf
    • http://kaxiwemusemoj.mypressonline.com/6397085053.pdf
    • http://danoguvu.medianewsonline.com/61870756227.pdf
    • http://xunopapazugatar.medianewsonline.com/35137699404.pdf
    • https://cdn-cms.f-static.net/uploads/4415527/normal_601d7ab88e587.pdf
    • http://kidulukapaxarej.iblogger.org/baca_novel_ceros_dan_batozar.pdf
    • https://static.s123-cdn-static.com/uploads/4491148/normal_6004bef908002.pdf
    • https://cdn.sqhk.co/feluxolid/Gdgchd0/pivavupaxoxora.pdf
    • https://cdn.sqhk.co/pigexebobe/DgdPlB1/woxebewarenadonobubu.pdf
    • https://cdn-cms.f-static.net/uploads/4405929/normal_602088661aa22.pdf
    • https://wilosobofixi.weebly.com/uploads/1/3/4/8/134858013/panajeji_zerezo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zaxuledo/41692753994.pdf
    • https://s3.amazonaws.com/zaxawetawupo/movie_maker_online_free_2019.pdf
    • http://jekopadifixuniz.epizy.com/how_to_start_preparing_for_usmle_step_1.pdf
    • https://s3.amazonaws.com/fadadedezeker/bts_album_answer_playlist.pdf
    • http://jolijugidepim.rf.gd/81230981723.pdf
    • https://s3.amazonaws.com/jupoti/84543512141.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_off0000f131.bin
2203d88f74ec37a96c0e283c152d467b75e50600da2ec3d003054fc699ff62ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 4820 bytes
font_01_sfnt_off00010174.bin
d8424aafd856d8bfd8192ebf43c38f790a0ce4f78bcbf03cec876aa99f5c9791
pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 10348 bytes