Malicious PDF — malware analysis report

Static analysis result for SHA-256 462abc8492ea2b8a…

MALICIOUS

PDF

78.1 KB Created: 2021-03-11 07:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6362f630b08999511ee390b738baaaf7 SHA-1: 46640f7a224bca754d68baf3045aaa59d5bcbb6f SHA-256: 462abc8492ea2b8a62343cb88e336aafe8c4ef548d924d6d8d7d822a9b89bda8
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URL and document body suggest a lure related to 'Heroes of the Storm' bug reports, directing users to a suspicious domain. No scripts were extracted, but the PDF structure itself likely facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=heroes+of+the+storm+bug+report+forums
    • https://static.s123-cdn-static.com/uploads/4368221/normal_5fccee254e173.pdf
    • http://ig-mediateam.net/rejipajiligyt7kj.pdf
    • http://kerosijuvibeg.scienceontheweb.net/puwisidigalejixidepuweros.pdf
    • http://bumaga.bz/jasilamjsq3v.pdf
    • https://cdn-cms.f-static.net/uploads/4407064/normal_60464cc6898dd.pdf
    • http://tujidal.mypressonline.com/kemuzalopug.pdf
    • http://wozupabalaviv.medianewsonline.com/facts_about_human_brain.pdf
    • https://static.s123-cdn-static.com/uploads/4453553/normal_5fe4c44059b3b.pdf
    • http://nutosuvitiraj.scienceontheweb.net/gamenaga.pdf
    • http://jipolavex.medianewsonline.com/kovedagewo.pdf
    • http://lelekelosutov.getenjoyment.net/spotify_music_metadata_style_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/numunenoji/brother_j4710dw_wont_turn_on.pdf
    • https://s3.amazonaws.com/zasepo/pegikokotafasaregesaxeb.pdf
    • https://s3.amazonaws.com/jefazaxal/95733239204.pdf
    • https://s3.amazonaws.com/xifabilejilab/15571321206.pdf
    • https://s3.amazonaws.com/mixanaz/audi_a6_repair_manual_free_download.pdf
    • https://s3.amazonaws.com/tomamujuf/southwest_airtime_player.pdf
    • https://s3.amazonaws.com/posufij/fomemowerukesab.pdf
    • https://s3.amazonaws.com/domegagowevag/48816121204.pdf
    • https://s3.amazonaws.com/vuforewebub/4866605823.pdf
    • http://petojijoxura.onlinewebshop.net/2003_jeep_liberty_sport_utility_4d_for_sale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc5b.bin
48089ebd4a5d75193d5fdbb469256dbbecd91f2df7ec5fb4fc1470147f954c5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5B 3588 bytes
font_01_sfnt_off0000e94e.bin
012efdf3b0b1547e903ef8630d32474bbd20ec2acc279befa4600c3e693fb2f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 5176 bytes
font_02_sfnt_off0000fac2.bin
0bb5540a06c88204c29cdf04297d60273c9d968175c083b53e0977e86d41f9f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 15968 bytes