Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f8ec9559d594b5…

MALICIOUS

PDF

87.2 KB Created: 2021-04-19 23:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4086af0f421a754f91adc2c5e6513225 SHA-1: d53eb6d05ae8dcc1a69fbd711846fc7f4a2d2529 SHA-256: 54f8ec9559d594b50086e6a9e9174e00814b1dd2d1afb022c4556d75b27b98a5
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, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan. The embedded URL is likely intended to redirect the user to a phishing site, aligning with the Spearphishing Attachment technique.

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://vilenefex.ru/strik?utm_term=this+is+water+david+foster+wallace+speech+summary
    • https://cdn-cms.f-static.net/uploads/4462986/normal_5fe6dc7b830d8.pdf
    • http://winoraama.site/32358377421ji3rx.pdf
    • http://rating-bookmaker.ru/nizisugiladowuwixisitiwa6msfi.pdf
    • http://copyrighthelpbusiness.net/55537295479ae7wk.pdf
    • https://cdn-cms.f-static.net/uploads/4416923/normal_60215f65a48dc.pdf
    • http://confirmyourverifiedbadge.com/17114658539dd9he.pdf
    • https://cdn-cms.f-static.net/uploads/4389599/normal_6018be0e70000.pdf
    • http://vofawurokalini.22web.org/76412424026.pdf
    • http://myluckybet.xyz/51626320002l4ak.pdf
    • http://zhenskiizhurnal.ru/what_software_works_with_cricut_expression6yho3.pdf
    • http://politach.com/969002146623mg3r.pdf
    • http://cloudmarket.website/kokifopazhrr9.pdf
    • http://matanusebatug.22web.org/wumeferuxitera.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://21dbc830-6d60-48ad-8ab0-00d2b3cb69e0.filesusr.com/ugd/18d949_26579d74e0aa46b289cb6e2697ec741c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c6d9e635-348b-4d52-b10b-6e4adf1a3914/49341143085.pdf
    • https://uploads.strikinglycdn.com/files/0385a56f-ba3a-4fab-b49e-39f551b2021c/flight_simulator_x_steam_edition_graphics_mods.pdf
    • http://tinulelor.rf.gd/balloon_decoration_pictures.pdf
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_65ef804659e2425c89960adb3cde6ba8.pdf?index=true
    • 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_off000116a4.bin
a19147381b2ef3fff24bea72c6042ddfdf216f77f8b1e276a20fd47dc4b0f712
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A4 5596 bytes
font_01_sfnt_off000129a3.bin
152c07e1d72d1b27f6832d937a24a74b1f4e6f86d0d7909554fc15020419e6ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 11200 bytes