Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e6146676ee1046…

MALICIOUS

PDF

97.2 KB Created: 2021-04-21 19:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daa095cb95a6b7899be0e893f8f8c17b SHA-1: 2a7329a087b60183e069c00c86028dea63ab88f3 SHA-256: b0e6146676ee10467bd3d757fbebdb6c2d5b9a734297ffdc4d39e829b79f3bf2
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or redirection mechanism. One of the embedded URLs, 'https://kuzutuzo.ru/strik?utm_term=arduino+nano+programming+language+pdf', is a primary indicator of the lure content, while other URLs like 'https://s3.amazonaws.com/nazekisigiduz/zanegaramonifugara.pdf' and 'http://instapriz.website/ball_mayhem_apkpured2idm.pdf' are also suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=arduino+nano+programming+language+pdf
    • https://cdn-cms.f-static.net/uploads/4479214/normal_6069e086e1947.pdf
    • http://instapriz.website/ball_mayhem_apkpured2idm.pdf
    • https://cdn-cms.f-static.net/uploads/4459926/normal_6052cc79b8ae9.pdf
    • https://cdn.sqhk.co/wexapitode/xIjhlie/active_and_passive_voice_complete_rules.pdf
    • https://linerebe.weebly.com/uploads/1/3/0/8/130813546/e78beb.pdf
    • http://trokot-online.xyz/sherlock_holmes_series_sub_indo_batchcrm5t.pdf
    • https://fedijukesubi.weebly.com/uploads/1/3/4/6/134600597/rugexaraw.pdf
    • https://cdn.sqhk.co/nujidegowupi/0jiidhc/square_body_chevy_for_sale_in_arkansas.pdf
    • https://cdn.sqhk.co/zoxunoromi/ge9gj57/93391032469.pdf
    • http://select-get.top/land_and_water_on_earth_worksheetchjzr.pdf
    • https://cdn.sqhk.co/lazimafuxuxi/ggcjeha/komow.pdf
    • http://golosa-spasibo.ru/invitations_card_templates_free_sn2l2o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nazekisigiduz/zanegaramonifugara.pdf
    • https://s3.amazonaws.com/zumezeviwakiz/10234258304.pdf
    • https://s3.amazonaws.com/vibasujefir/hourly_calculator_timesheet.pdf
    • https://s3.amazonaws.com/bogeguva/american_heart_association_htn_guidelines_2017.pdf
    • https://s3.amazonaws.com/mogedozara/aqua_barbie_girl_song_video.pdf
    • https://s3.amazonaws.com/rujimidujek/fofododuguzabu.pdf
    • https://s3.amazonaws.com/wexoteluwag/14125659670.pdf
    • https://s3.amazonaws.com/lososimap/15034152821.pdf
    • https://s3.amazonaws.com/jivuxo/bots_pokemon_go_android.pdf
    • https://s3.amazonaws.com/libusamagowuvo/what_size_sim_iphone_5c.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011826.bin
18b8b53af176348d8187054a54095da576713695eaec2059509b889f4e8ad988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 4016 bytes
font_01_sfnt_off00012653.bin
596f82fc6e39718aac496e2df3dbaac811e74fa0faa2b8c9dfb39989041ae688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12653 5172 bytes
font_02_sfnt_off000137dc.bin
d475fce07539429023c1fc3330d4f7e7a654176af24ec4373751a4ca5e247071		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137DC 11752 bytes
font_03_sfnt_off0001600b.bin
3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1600B 16164 bytes

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