Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff002d8c4031e6b2…

MALICIOUS

PDF

78.2 KB Created: 2021-03-20 02:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81bbf3a9bcbbb9d21df5f605df09fc3a SHA-1: 903cf59a2c3afdfd1bb8aeb52f5a5fdadf32331d SHA-256: ff002d8c4031e6b226ca05ebdf41e6dda89fd7ce67302a62f3e897956e36cd53
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to downloading PDFs, suggesting a lure to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=codex+magica+pdf+download
    • http://sitajejo.22web.org/zilurikodute.pdf
    • http://lightstart.xyz/att_pace_4111n_routerrkmnv.pdf
    • http://xalisuvo.22web.org/57705884304.pdf
    • http://blue-tick-central.com/nesibavepit6ckok.pdf
    • https://lelunoforonu.weebly.com/uploads/1/3/1/6/131606056/tarejizug.pdf
    • http://tk-pobeda.site/how_to_print_without_color_ink_epson_windows_109fbdy.pdf
    • http://lukufogud.getenjoyment.net/butuxiw.pdf
    • http://tonedomopoja.scienceontheweb.net/what_is_the_product_rule_for_square_roots.pdf
    • http://fovoxarofej.getenjoyment.net/english_vocabulary_for_test.pdf
    • http://fitatuvepejozo.sportsontheweb.net/gauge_theory_of_elementary_particle_physics_cheng.pdf
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/c7c0677.pdf
    • http://bcpreactiva-enlinea.com/xapixozulokafakunebuvozjku2h.pdf
    • http://jetavimazi.22web.org/ntr_mahanayakudu_movie_free.pdf
    • http://sparzha.club/everything_is_awesome_trombone_sheet_musicyb9qj.pdf
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/pivivubelovuroben.pdf
    • https://logazimakopaw.weebly.com/uploads/1/3/4/3/134399250/xuxubazuma_zukam_dekor_tevaguvurufuxeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/176703a2-5110-4ddf-82f5-356136fc3c56/8089269703.pdf
    • http://wanivuwegif.rf.gd/medios_de_comunicacion_en_redes_informaticas.pdf
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_d6381ce8e61b49c2b36f697ca9b96673.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d09e708c-355a-4e28-b6d0-46c25410e40d/11019922541.pdf
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_bf0a0f74601545a58089f0dcb2cb926e.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de61.bin
89f9a460050ec8001ce59195f5d0153142278bc2282b0094dffb5b72cbf3076b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE61 5264 bytes
font_01_sfnt_off0000f04f.bin
e4658c843097e68995d0b4e2e25d1d8a3590111283175e3dd34fe74a7d3ed612		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 11104 bytes
font_02_sfnt_off000115f6.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F6 16204 bytes

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