Malicious PDF — malware analysis report

Static analysis result for SHA-256 573c760fb7b2de89…

MALICIOUS

PDF

45.3 KB Created: 2020-11-08 00:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 392575521e2f5bf6e0abcf091ec0704b SHA-1: 25686b34969907b1bb00e50d41f763d1faaffeda SHA-256: 573c760fb7b2de89a87f4dfcbbc4f13dd73a38dbe14697835004a6870fe97685
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=marantz+owners+manuals+free PDF link annotation
    • https://naxufubiromu.weebly.com/uploads/1/3/0/7/130738890/xafupuzep-webamitiw-varapipubiw-govijuvexafod.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/ribigevevamos.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/b6b930ed786.pdfIn PDF document text
    • https://nabofirolem.weebly.com/uploads/1/3/4/6/134632364/85ba678.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/2249666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5fa5a74027277.pdfIn PDF document text
    • https://kakoxisowi.weebly.com/uploads/1/3/4/3/134358665/fedosudinir.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/0addf912-5334-41b0-9086-017e9dffc087/66092284906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a3c9ca-abfa-4bd6-9aa8-db270a91e17f/domekipoxitabozebebome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88c7df6-77fb-477f-8399-d1786c180aae/segifupukefaxuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4992b37e-e467-492b-b7f6-2f6e4e08f9d3/tiziduledunojuworilako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667c917c-ea8c-404c-ad7a-cd3e5c5069c0/tv_series_cast_zero_zero_zero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ab94c2-fb11-4886-8751-64b50fca5306/xuzewozala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca67de2-53a5-4443-a176-0cd6b0348ec9/13230038250.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_off00006534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6534 4896 bytes
SHA-256: 135eefe75f9a2e9a18e9288c3fdd54ab52ccabe6351ac182470f9b275e6aa954
font_01_sfnt_off000075dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 10652 bytes
SHA-256: e8dfaa2316a7b5353e2292e06577491ac8e4f49e8256b0db5a389483fd384bc4
font_02_sfnt_off00009a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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