Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69db39d4579cd2d…

MALICIOUS

PDF

76.8 KB Created: 2021-04-06 20:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 416e5771dc4252dd37a88cbc250eb4f8 SHA-1: 7ab0bb2837fbba812e4bf2c848fc564b209cbf78 SHA-256: d69db39d4579cd2d2428c6dfa28da69996a98bc66562d3e9798b15c77defade8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as legitimate documents or updates, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs point to potentially malicious or deceptive content, aiming to trick users into downloading further payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/123?utm_term=android+tv+os+update
    • https://cdn.sqhk.co/dopiporajen/hmyJgii/battle_update_brief_template.pdf
    • https://cdn.sqhk.co/lopumilekana/iffrjcG/sky_force_reloaded_switch_2_player.pdf
    • https://cdn.sqhk.co/pawekenu/t8xDjiW/bubuxi.pdf
    • https://cdn.sqhk.co/xusikeko/giHIF0j/wow_bfa_enhancement_shaman_guide.pdf
    • http://flylovel.com/new_english_mp3_songs_free_download_320kbps5p9fe.pdf
    • http://circulshtangcalip.website/vejevananopimefixdesq.pdf
    • https://cdn.sqhk.co/zunesunatiri/eAZgfIe/real_gangster_crime_2_game_online_play.pdf
    • http://prizinsta365.online/kogiwelipuxovirunuwidutnie9b.pdf
    • http://pasendapp.online/wegogaxqz28.pdf
    • https://cdn.sqhk.co/fomeluxilim/hwMIV7C/xibudasulavoren.pdf
    • https://cdn.sqhk.co/turaxulefa/21OV3gf/dashboard_neon_crm.pdf
    • http://leyloften.online/how_many_gallons_of_flammable_liquid_can_i_transportf3mpe.pdf
    • https://cdn.sqhk.co/janurisu/DTjdhje/cheat_rollercoaster_mania_mod_apk_offline.pdf
    • https://cdn.sqhk.co/jesisoritet/8aOtAU3/79590603026.pdf
    • https://cdn.sqhk.co/tosaporafoxa/l9y62uq/lol_kalista_guide_deutsch.pdf
    • https://cdn.sqhk.co/dosakupu/gjbij4g/minecraft_plants_vs_zombies_mod_crafting_recipes.pdf
    • https://cdn.sqhk.co/guvevifowo/ijhfhbD/little_tikes_basketball_hoop_toyworld.pdf
    • https://cdn.sqhk.co/nuvexajamu/jqpXobO/guess_men_cologne.pdf
    • https://cdn.sqhk.co/ripowusaro/diijfOS/3529246805.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_416d105717d04d3b8fdb8bfc7de698d5.pdf?index=true
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_f0401ee7afc143069e55672a88bc274c.pdf?index=true
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_8c496cbe1618458288c4c73d13a8f2bc.pdf?index=true
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_b0f986c5bb804da6959d3a8bae28ce72.pdf?index=true
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_eabe4c0d946a48ab939d0cd0a581227e.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_off0000f1b0.bin
ff211b3e8d377c58a8a85cb585633cd318d81e395217523f49698b125acb7b4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B0 4972 bytes
font_01_sfnt_off000102ad.bin
e1e10fa9d974d6df10167b28c464275ffef6a16cfbc81079bc06c1493920d6b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 10376 bytes

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