Malicious PDF — malware analysis report

Static analysis result for SHA-256 018598184924e0f2…

MALICIOUS

PDF

81.0 KB Created: 2021-03-03 18:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159bc1386c60674e5a1bdd8dc0421f5e SHA-1: 1e6c2ecbf91aef1d60ed0b01834752809cde25bb SHA-256: 018598184924e0f2f33742eba3cfbc0245228e06fffedb16a4f6d263db408790
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to psychology search terms, suggesting a social engineering tactic to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=what+are+the+four+goals+of+psychology
    • http://study-english-04.space/giperugukl2f4x.pdf
    • https://cdn.sqhk.co/tajiwikiter/djfdhgx/59385589413.pdf
    • http://xebupado.mypressonline.com/25863029721.pdf
    • http://my-favshopc.online/538702864564do5r.pdf
    • https://cdn.sqhk.co/kazamepa/Mtaicge/98942262651.pdf
    • https://cdn.sqhk.co/bonosexov/j4gfifd/21486513825.pdf
    • http://dajexori.mypressonline.com/what_does_chance_mean.pdf
    • http://sugameloxufe.mywebcommunity.org/2571079105.pdf
    • https://cdn.sqhk.co/xonumizeno/1j62CDc/52302028444.pdf
    • https://cdn.sqhk.co/dovawowo/YwCG2jh/weekend_away_deals_nsw.pdf
    • http://seedcraft.online/apple_airport_express_a1264_manual0yc7c.pdf
    • http://befotuke.mywebcommunity.org/kali_linux_app_store_android.pdf
    • https://cdn.sqhk.co/pesegozod/gdcq3hS/rakuwef.pdf
    • https://cdn.sqhk.co/resilano/iijjNhj/beautiful_wallpapers_for_screen.pdf
    • https://cdn.sqhk.co/tamejenonisi/hQjehd9/dobre_dunk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavalukato/xoderumuwugirix.pdf
    • http://dakafatuvuguviz.atwebpages.com/how_to_get_a_free_phone_from_metro_pcs.pdf
    • http://nowimirozox.atwebpages.com/mejawuxukoxam.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_off000100b8.bin
973e67bf19be3fbe734ca5e47e32d6f1bba88d7ca2db634d27ae1ce8984892bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B8 5392 bytes
font_01_sfnt_off00011327.bin
c7be757dbd2fc150de6af7391e24ade8e4c62bff256e21af76c8d5cc05f004ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11327 10300 bytes

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