Malicious PDF — malware analysis report

Static analysis result for SHA-256 08219399e8e680e5…

MALICIOUS

PDF

80.5 KB Created: 2021-04-24 07:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 966c6d2e2c0498f6c9321dc4c3a77e9d SHA-1: 704b52538c6358affa97e886d80ef948fa7cdefd SHA-256: 08219399e8e680e5dc82bd6328c5e3c4cafe51b0807c28b30a37d0ce4a0308bc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent to trick users into downloading further malicious content. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/strik?utm_term=d%2526d+3.5+divine+oracle
    • https://cdn.sqhk.co/wamamuli/dgjwWtu/dijegazezasopoporepib.pdf
    • https://cdn.sqhk.co/temirikuji/e9hdl7Y/cafe_racer_motorcycle_2020.pdf
    • http://fajamad.mypressonline.com/how_to_read_a_graphic_novel_worksheet.pdf
    • https://cdn.sqhk.co/genamudazunu/mhjifpv/8656840828.pdf
    • http://mowukedova.mypressonline.com/bjt_small_signal_analysis.pdf
    • https://cdn.sqhk.co/gixelotopa/ia3jbje/gavulafafamesufadujipop.pdf
    • http://pegijegur.mygamesonline.org/47303162863.pdf
    • https://cdn.sqhk.co/kiribikiv/dhjhcih/28930444302.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d309c080-ea70-4359-85bf-35175870d388/is_there_a_new_lg_phone_coming_out.pdf
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_2bb674880b864f4c999d32e91d38a07b.pdf?index=true
    • https://s3.amazonaws.com/julaxel/bts_idol_mv_mp4.pdf
    • https://s3.amazonaws.com/wopari/991211674.pdf
    • https://s3.amazonaws.com/gezetega/zepadabenefan.pdf
    • https://uploads.strikinglycdn.com/files/a0055623-251b-4a2a-a6be-1bbab589d266/95761250552.pdf
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_7223e67526684b129dd1911e27b58e9f.pdf?index=true
    • https://s3.amazonaws.com/daraniwekamidir/prueba_antiglobulina_directa.pdf
    • http://bopubedoru.myartsonline.com/alter_ego_b1_plus_gratis.pdf
    • https://uploads.strikinglycdn.com/files/56475e4e-d4f3-4313-9c04-3e12a10cf8e9/merajoxuzebopifilugal.pdf
    • https://s3.amazonaws.com/zalomi/virtual_villagers_4_game.pdf
    • https://uploads.strikinglycdn.com/files/1671b0f1-ae0e-4c48-8110-78ba9eb09599/celebrate_recovery_step_study_book_1.pdf
    • https://s3.amazonaws.com/xomudufe/66835072963.pdf
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_bb4bb8e03741483e9ad02513cfae2f28.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d4a8793f-c9cb-4db6-9ad5-9d846de24b53/rutipufesosofab.pdf
    • https://s3.amazonaws.com/getizar/wukabalatigan.pdf
    • https://s3.amazonaws.com/jodabiladezot/facebook_video_developer_tools.pdf
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_462dade585a94cc1b65df0b1637fcde0.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_off0000ffc9.bin
d46272a35c141788e45a942f60d3ac75eba256168db5716376ff56f0f84bb3df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 4156 bytes
font_01_sfnt_off00010df7.bin
2ba02a9e7598f4bbb54817a1a9f2b9d9a8c21e546cea75d1b5cd3f26c8807daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF7 11664 bytes

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