Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6a6d5bb64a100a…

MALICIOUS

PDF

78.0 KB Created: 2021-03-04 21:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d48311d027d1d063b8f7e4be27389f4 SHA-1: 80b8d911ec089a1111b26852f720bec6ae9d8dc3 SHA-256: 0c6a6d5bb64a100a5f2ae58aa82ada11268c99f143a21f046c9eb1aee1e726f7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the ClamAV detection. The embedded URLs and the ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and link farm indicate a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=trend+following+michael+covel+summary
    • http://sparzha.club/dog_doing_bright_yellow_poopfzbbm.pdf
    • http://formulamoney.top/talented_employees_synonymssm0w6.pdf
    • https://tafevivif.weebly.com/uploads/1/3/2/6/132682704/477d1f.pdf
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/xexozuwuduga-popotosasix-vavaveb-vowabanagovime.pdf
    • http://contentmedialiteracy.com/the_real_tevar_south_full_moviep0lwk.pdf
    • http://idealica-italiaufficiale.website/best_free_movie_apps_android_2019jnoja.pdf
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/9871179.pdf
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/jatiw_sakusuz.pdf
    • http://iciko.xyz/rapibunulusejudbt2cr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gebukil/todubuvo.pdf
    • https://uploads.strikinglycdn.com/files/84c6e78f-b99c-4f68-9c32-ac0695911c00/symphonie_fantastique_2nd_movement_analysis.pdf
    • https://s3.amazonaws.com/zaxuledo/jatozarafed.pdf
    • https://s3.amazonaws.com/kabisebax/puzetejinomedud.pdf
    • https://s3.amazonaws.com/sizabo/dazawakesinufu.pdf
    • https://s3.amazonaws.com/gotenukevepunin/google_spreadsheet_countif_multiple_conditions.pdf
    • https://uploads.strikinglycdn.com/files/1ae1f55e-a5ae-4f88-8e38-ed07c094caf8/niviguduvek.pdf
    • https://uploads.strikinglycdn.com/files/fccaa70a-9b80-4027-bd75-1305368125ee/takotomixunewu.pdf
    • https://uploads.strikinglycdn.com/files/4f5b949c-5cbf-49ae-ba54-e95cec97f80d/how_to_put_fabric_softener_in_amana_washing_machine.pdf
    • https://uploads.strikinglycdn.com/files/1720a09a-356c-4bf8-8676-7df637e3bcfe/solid_state_physics_textbook.pdf
    • https://uploads.strikinglycdn.com/files/ae613fb9-f90c-4af4-98b6-20808f287861/dasodul.pdf
    • https://s3.amazonaws.com/mejobu/rezaro.pdf
    • https://uploads.strikinglycdn.com/files/4917a0d1-3e83-428e-a536-4693554cd3bd/91714667971.pdf
    • https://uploads.strikinglycdn.com/files/14503e0d-2b86-49c7-b3b7-20aff444ed2d/kirby_g10d_manual_download.pdf
    • https://s3.amazonaws.com/nisoxow/7498971620.pdf
    • https://s3.amazonaws.com/taguxif/dynamics_management_reporter_versions.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fc.bin
d384e17559ea8986ad8327798507b896772ad3852012261c0885b10d1fe3cb3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 5636 bytes
font_01_sfnt_off0001061b.bin
2855d287626bcb95153075bb90d3b480dc78b6384db6330ae64de8fa701f7dc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 10704 bytes

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