Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d3ced16b32bee6…

MALICIOUS

PDF

80.9 KB Created: 2021-04-17 18:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eb68f23596e3b8a86549026f883b530 SHA-1: ec4e7859c48a1d16a619521fd32f68ed1d3dd9fd SHA-256: 64d3ced16b32bee65d1a191aa8d942a5f80424b903eb7995c5409cc36e552d57
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=how+do+you+spell+daughter+in+law+in+spanish
    • http://craftsmansmetics.com/kiwudexelovimopegagovibwwh4.pdf
    • http://kulotaxewupugez.iblogger.org/best_meditation_music_for_sleep_free.pdf
    • http://maxitis.22web.org/checkbook_register_template_for_mac.pdf
    • http://bupuxojif.iblogger.org/39450493708.pdf
    • http://xaduwufuwa.22web.org/sivavusazud.pdf
    • http://site-shop.xyz/mgmt614_handoutsli9ug.pdf
    • http://legendnat.space/musica_gratis_para_celular_androidho9mu.pdf
    • http://werenntaq.online/trap_rap_instrumental_beat904bv.pdf
    • http://fevozogu.iblogger.org/architecture_apps_android.pdf
    • http://idealslimitalia-ufficiale.site/kaverejatufur2x8d.pdf
    • http://dewexipe.22web.org/arvo_part_berliner_messe_score.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pakafadudu.epizy.com/wiwikawizimiwojinawufew.pdf
    • http://toxodetu.rf.gd/xolipavire.pdf
    • http://pifetipopazemex.rf.gd/36872915663.pdf
    • http://nubirenewukuz.rf.gd/bafolazesugubamap.pdf
    • http://volowunodevikel.rf.gd/gilovuvetotiresu.pdf
    • http://vutuzirowu.rf.gd/best_wap_in_hollywood_movie.pdf
    • http://runumebutevota.rf.gd/element_elefw328_wall_mount.pdf
    • http://fodozuzur.rf.gd/tratados_internacionales_de_mxico.pdf
    • http://xaposekesudonod.epizy.com/80219957633.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_off0000eb48.bin
0a4b5c31f4257e5a2707017370dcf829c84058060820f6748bf1d2aeb2c81f0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 3044 bytes
font_01_sfnt_off0000f61c.bin
f3edeca7f6c78874f9a1e6bcd959b79f3957cc29a5ae2f55f396aada3b5c130d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 5376 bytes
font_02_sfnt_off00010873.bin
2e2d0f362aad4848863f229a94141b7669513a6f9ab4d652962b6a54cbadc9fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 13112 bytes

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