Malicious PDF — malware analysis report

Static analysis result for SHA-256 a694cc852f6834a5…

MALICIOUS

PDF

68.1 KB Created: 2021-03-27 10:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d66d17faa39e663c2c16f466b4dd363d SHA-1: 525321f54f4e3d126b8076da254afc90f312ec94 SHA-256: a694cc852f6834a524a4441b3259a88cb964f432aee151018257f5e2ad0c5809
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf. The presence of numerous external URLs, many pointing to disposable domains, strongly suggests a phishing or malware distribution attempt. The primary malicious URL identified is https://jottigo.ru/award?keyword=angelus+silesius+libros+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9402

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
  • 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
  • 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://jottigo.ru/award?keyword=angelus+silesius+libros+pdf
    • http://setofexperience.site/samsung_nu7100_43_inch_price_in_pakistan5odzk.pdf
    • https://cdn-cms.f-static.net/uploads/4374207/normal_6055be4d62c4c.pdf
    • http://reduslimitalia-oficial.site/ciudad_fantasma_bernardo_esquincas0aer.pdf
    • https://cdn.sqhk.co/zikonidenijo/bibW83V/11762415641.pdf
    • http://piredvizhnik.com/game_commando_survival_battleground_mod_apks9z0k.pdf
    • https://cdn.sqhk.co/fiduzosi/chikheF/66636586068.pdf
    • http://betizekaxu.getenjoyment.net/how_to_make_cool_science_projects.pdf
    • http://zekaxezixil.medianewsonline.com/momo_traders_amazon.pdf
    • http://luminar2-download.xyz/text_to_voice_changer_software_free5gkd6.pdf
    • https://cdn.sqhk.co/xipepovivik/dgjgfhg/10137249261.pdf
    • http://botanilix.mygamesonline.org/ias_zoology_syllabus.pdf
    • https://cdn-cms.f-static.net/uploads/4381098/normal_603159714339f.pdf
    • https://cdn.sqhk.co/rubutemoxe/jgheia5/idle_forge_craft.pdf
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5fd3c2d4b2bae.pdf
    • http://sovuradema.medianewsonline.com/how_long_do_snow_blowers_last.pdf
    • https://cdn.sqhk.co/bivuwusim/hkB2GDC/free_streaming_apps_for_xbox_one.pdf
    • https://cdn-cms.f-static.net/uploads/4418963/normal_605d82494a66d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_b744d60accbe4e0eab474146427ec47b.pdf?index=true
    • http://gogujigasad.onlinewebshop.net/najudiw.pdf
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_37dd890313744bdc8ac1ad19f4e4d4d1.pdf?index=true
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_26de11017fc4434cb2b6ba22553e6fd4.pdf?index=true
    • http://kozogasivufi.myartsonline.com/bogunanu.pdf
    • http://gezixus.myartsonline.com/wotis.pdf
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_207e2f7ff9594d1ab6a25012ad9cc43c.pdf?index=true
    • http://duxegejuw.atwebpages.com/5039731686.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7cf.bin
b6e022022eedaf1c540686d9cbd505f25e3bda70c0f4273ca3aa8c36abc69978		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 5128 bytes

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