Malicious PDF — malware analysis report

Static analysis result for SHA-256 1957d1f8e54e833a…

MALICIOUS

PDF

86.3 KB Created: 2021-03-15 06:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 942c9dbf0b872972a80f72d79568cdb9 SHA-1: ea4eec31be9aa830d48406ea6d3c9750a1f2b1e6 SHA-256: 1957d1f8e54e833a4d1932444f28c2e3aa9aea8fc4a34c3803a528dcc33a8204
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a further payload or visiting a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/award?keyword=management+information+systems+business+driven+pdf
    • http://laregazobo.22web.org/xavut.pdf
    • https://cdn.sqhk.co/zadexona/8ggICxa/personalized_cast_iron_skillets.pdf
    • http://uscreditmonitoring.info/bujitimexezerugobessvseo.pdf
    • https://cdn.sqhk.co/vunebapenuj/gd2yVjf/rixanowopis.pdf
    • http://dostafood.xyz/sd_kfz_234_2qcq4z.pdf
    • http://filopibat.22web.org/how_to_play_bar_chords_on_the_ukulele.pdf
    • http://soul-felt.com/the_little_prince_full_movie_download_in_hindi_480plmhjn.pdf
    • https://cdn.sqhk.co/fijajiles/gfigLEB/citadels_medieval_war_strategy_with_pvp_mod_apk.pdf
    • https://cdn.sqhk.co/wodaximewule/frciilq/88312489685.pdf
    • https://cdn-cms.f-static.net/uploads/4481667/normal_603b8883da349.pdf
    • http://wotuxolis.iblogger.org/esv_personal_reference_bible_review.pdf
    • http://awpmode.com/pharmacology_of_anesthetic_drugswlekf.pdf
    • http://vatidenow.medianewsonline.com/nibowefivadurezil.pdf
    • http://rowexusaje.mypressonline.com/20048552574.pdf
    • https://cdn.sqhk.co/xonipavu/cibpiiX/how_to_make_origami_flowers_with_one_paper.pdf
    • https://cdn-cms.f-static.net/uploads/4458388/normal_60200a9021e7e.pdf
    • http://afracheat2.xyz/wekemepak0c4l.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woxorojero/ximemepuwebelepa.pdf
    • https://s3.amazonaws.com/metubevozisul/ruxore.pdf
    • http://xefowipiv.rf.gd/57371069603.pdf
    • https://s3.amazonaws.com/jozaponi/vekoxakivupojuze.pdf
    • https://s3.amazonaws.com/davubewu/momentane_nderungsrate_aufgaben.pdf
    • http://tuzipani.rf.gd/ankhiyon_se_goli_maare_song_pagalworld._io.pdf
    • https://s3.amazonaws.com/nelizenejakarug/vunedaj.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_off00011418.bin
8b6483855d1811cad3e0d6a5ba05bdb01860d9070c80ceb22c9c63aadfb53e56
pdf-font-stream PDF embedded font (sfnt) at offset 0x11418 5636 bytes
font_01_sfnt_off00012747.bin
acbd2e6254496835276a3973140df0dff7adbc7a9f8c6b2eb46c47ccf3e79d0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 10872 bytes