Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3fa051fc221510…

MALICIOUS

PDF

49.6 KB Created: 2020-11-05 23:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 76173f3d6f9dc5aa04aa6e0e6fd5b39b SHA-1: 7e10133790baea5cd8bc7e816c41219300f8e1e2 SHA-256: 7f3fa051fc221510a9857321f1632dba2173cdae7696050288632a0921616c50
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://trafffe.ru/aws?keyword=reglas+del+voleibol+con+imagenes PDF link annotation
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/a6de10f1.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/3433142.pdfIn PDF document text
    • https://revamimetanezoj.weebly.com/uploads/1/3/4/5/134597499/putusudazop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f90fbef65d42.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/3011022.pdfIn PDF document text
    • https://ganubosi.weebly.com/uploads/1/3/4/5/134506756/nifofumuwivoxoz-newega-gevonenidawar.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/lokebuxusajukos_fejerir_desesuw_lofitovozi.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/zedutedunivopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ropuba/north_point_high_school_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fa9fbe-dc7a-4ddc-9049-c0f4d6599435/bilaxif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0654d0ab-8db2-4f4a-a348-0fffab29ec25/nc_labor_laws_for_15_year_olds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b51fab7-32cb-4576-b718-a3e759f5e84e/nexoxurorixerifikulozami.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6481 5368 bytes
SHA-256: dad95bbb897cec0e64b7b09571b4702fdd86996594f005257a7ada6b7590d47c
font_01_sfnt_off000076b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B9 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F46 11108 bytes
SHA-256: 76c86d8781722908cb4f6377726989f1bf852d21e8db5a4f59629e8922e5a75c
font_03_sfnt_off0000a399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA399 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b

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