Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0501ad044284353…

MALICIOUS

PDF

41.0 KB Created: 2020-10-01 02:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 91a97a8d62aa7e8e1d7b872f94d5770e SHA-1: 87785f2a57b71ea0ee98fa71ae079f37873c47c3 SHA-256: f0501ad044284353ec84b5148925e7d9225c6e8a3214de986977fdb5cd8b3307
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=after+the+love+has+gone+piano+sheet+music+pdf In PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/86851789369.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/xivagopuvo.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/rosobezimelolobunuzatonu.pdfIn PDF document text
    • http://gilemoki.xaacm.org/uploads/1/3/1/4/131454536/jeraxitonij_widenode_sovakuraresus.pdfIn PDF document text
    • http://files.ayishamoss.com/uploads/1/3/2/6/132683181/jemulupaxilaz.pdfIn PDF document text
    • http://files.anothercollegefashionblog.com/uploads/1/3/1/3/131381204/319b3ac1048a414.pdfIn PDF document text
    • http://files.nathanjoyal.com/uploads/1/3/0/8/130873826/4239751.pdfIn PDF document text
    • http://files.tutorialpt.com/uploads/1/3/0/7/130776343/1449593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04884baa-30fe-4200-8f38-9bb45bf91d35/pewis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351041d1-388a-4713-8608-7b2b1a0d17de/47634344274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8508fcb9-ed3a-40ff-93b5-009a2afe95f0/12787296495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5950b29-fc9e-46ab-98e8-519abcf20bde/juviluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8055a8-7a9e-4e4e-95c8-d712fab81fad/32551990498.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F90 5620 bytes
SHA-256: 1ab44903747bf0d83613dfb7b60a41e76ad42bdcd649f7ac7c4b550e43d057e9
font_01_sfnt_off00007291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 10524 bytes
SHA-256: 3604f299854e2d15b23357ad0625b71ce502468b297e7a38daf9746709aed04a

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