Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7f272497fc2cd6…

MALICIOUS

PDF

44.1 KB Created: 2020-10-28 12:57:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7224431e5214826d27a63848ac99f165 SHA-1: f75dc229c5f3aa2f8811686f8dfffaae5aa007b0 SHA-256: 8c7f272497fc2cd64a8876d010b7cfc397e2a28c9defb152748afb3f002841d4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=watch+burn+notive In PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/1183494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f8a9259b86d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f90e8261daf1.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/4573418.pdfIn PDF document text
    • https://bififofivajarat.weebly.com/uploads/1/3/4/3/134315789/pazibisurikimanosawi.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/wabibaku.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/560459d7c7a76b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bb254a00-26e9-48d9-a823-c6dca84bec78/fuwafojej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08aa3da6-a92a-4f58-9772-fe19f8e137de/dovelujutatibajagoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3512fc-879c-40ab-b79b-2efc3121f3f3/bekobedomejanuzamugixav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e546b42e-4df9-4c44-aa82-98589cd369d7/gloomhaven_character_ability_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8dcd66-c4e3-4480-b875-c530c2c2dd96/24635184269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fdec2c-1d44-4f02-99c9-552a8f9e5574/nenjodu_kalanthavale_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/43585178053.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/differential_and_density_gradient_centrifugation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7639b6b3-3bb4-4e71-97d5-c4023a06acb2/56184476081.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D26 4772 bytes
SHA-256: 3445e2f12049581c0b806302fdd73d5945ea067fc70060eede1b48a7cb6e82d7
font_01_sfnt_off00006d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5F 11848 bytes
SHA-256: 0b19e8d5f8b1f146eae7ee164bbca6205785e484f57323066f483ab9f5b62eaf
font_02_sfnt_off000095ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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