Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0c55a229da050b…

MALICIOUS

PDF

53.8 KB Created: 2020-11-07 22:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: bf6f9672a4f2bc76adced7f4f44ecd65 SHA-1: b0c2c27b9b9871029e2134973a0990bf5329bc5f SHA-256: bf0c55a229da050bee94b93ff495b0f46b3925926998ab9e84ec6d9e9d735249
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://trafffi.ru/aws?keyword=abn+amro+mortgage+group+lien+release PDF link annotation
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/1009015.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410018/normal_5f994ed080c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5f9696e395c08.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/0b8998a2a0561bc.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/4817958.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://derapajovir.files.wordpress.com/2020/11/bike_race_pro_hacks.pdfIn PDF document text
    • https://matodokabaj.files.wordpress.com/2020/11/risafapovuk.pdfIn PDF document text
    • https://pavezisetapo.files.wordpress.com/2020/11/38476092554.pdfIn PDF document text
    • https://wigobasale.files.wordpress.com/2020/11/selolagowiruwavowe.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/kitowor.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/city_of_saints_and_thieves.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_off00008565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8565 5148 bytes
SHA-256: 9afdb93cdffa30818bbe63b95eef18dcb1c9a7b1c9447a02502173b54b0ab6f6
font_01_sfnt_off000096c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 11232 bytes
SHA-256: 7b117d08b45f804b6c8a6630816212945d864b80120544bccc4147aabbadff8f
font_02_sfnt_off0000bc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC20 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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