Malicious PDF — malware analysis report

Static analysis result for SHA-256 875e464f6067010f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-11 10:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c56a2942f3d9337261556e7e8090a737 SHA-1: 297fa9b0827861919481c8c346cd7fa156e06580 SHA-256: 875e464f6067010f837854ae0d85ebe2c18a706aa4134027bcea8a86b80d955f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to suspicious domains and are indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://zajinet.ru/award?keyword=addition+table+chart+pdf
    • http://mini-cam2.club/lipubekoa5x2s.pdf
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/65af33.pdf
    • http://se-mrush.com/jutadilonixavedasiwosemoqi011.pdf
    • http://mists.space/bissell_powerclean_swivel_rewind_pet_upright_vacuum_manualvhxtt.pdf
    • http://nukels.xyz/solution_chemistry_equations_worksheetz41x6.pdf
    • http://trikotoria.ru/fegomapureromevekitd9yp2.pdf
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/tumumaz.pdf
    • http://tonagruz.ru/fugipisefupijudamogojsxj0w.pdf
    • http://blockhcain.host/86568982175pbjaw.pdf
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/gonipere-lepogadolit-kosubos.pdf
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/a0eb92b76fe3e4.pdf
    • http://meetraisins.club/95638392742z9z6t.pdf
    • http://edalovert.xyz/79803166750und9u.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9d0417d0-6e75-4489-b671-da42b5237bcc/e_myth_hvac_contractor_audiobook.pdf
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_73c5f3e6e82b4484b1657a88d3047319.pdf?index=true
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_35a2b936b98048c0b2edb5fabf29e8d0.pdf?index=true
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_c860781affe64b068c1c14a25ebb58ff.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0606d7cd-910b-48de-8eb6-a216ab053fbe/gajukujixerazakuligenu.pdf
    • https://uploads.strikinglycdn.com/files/2f0ad646-1720-4ef3-be30-53431987b293/73314204361.pdf
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_867b8f29190741e48ab48158f09e0ca3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f4a085ac-8735-430a-b886-2cc1c5b87811/resolution_of_a_streetcar_named_desire.pdf
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_e59bccb4131c43cd8847fa28fb17797b.pdf?index=true
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_61cdb9ab7d19495788287428873988ad.pdf?index=true
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_b0810b5ad44f47e589b60254d31f680d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d9a9eef0-95c2-4b0d-8e15-06d036ca13ec/mind_power_subliminal_results.pdf
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_8e4e679e09ed4d259a30ca9bbdf4ef23.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_off0000dc8b.bin
bfeec8da295d8df11ce05892debc536ce6791454b09ca0458f096e8690937f74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8B 5192 bytes
font_01_sfnt_off0000ee2b.bin
d356f9aa4dff48cf22ee6c6d064ddea503d0fb932f88acf0d9a2135e500bef59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 13892 bytes

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