Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d374796bac1bfbe…

MALICIOUS

PDF

45.7 KB Created: 2020-10-05 01:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b14055013366dba933844dfe00f9ba1 SHA-1: a7c3f6a727840ebd3d611b56d96808edf84e5a3d SHA-256: 3d374796bac1bfbeef77398eaa518a1dc4b305529e831a0af3ecfb827736ef27
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://cctraff.ru/strik?keyword=multivariate+data+analysis+pdf In PDF document text
    • http://files.somethingforsam.com/uploads/1/3/0/7/130740146/razerubosenewod.pdfIn PDF document text
    • http://files.rautoulab.com/uploads/1/3/1/8/131871535/1908271.pdfIn PDF document text
    • http://jabotis.amandadavisart.com/uploads/1/3/1/6/131637254/ragawogu_pidezub_fikova_xubajedi.pdfIn PDF document text
    • http://sijev.ilovewatervalley.com/uploads/1/3/1/3/131379117/zuxuragapokef_gafanuvedopa_nabefuna.pdfIn PDF document text
    • http://dolote.brockenhurst-station-taxis.com/uploads/1/3/1/8/131857120/lavabuguxut.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/12641645843.pdfIn PDF document text
    • https://site-1039632.mozfiles.com/files/1039632/17703455756.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/titubu.pdfIn PDF document text
    • https://site-1039669.mozfiles.com/files/1039669/rufebomi.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/11345319323.pdfIn PDF document text
    • http://vasoj.eastwestmassagestudio.com/uploads/1/3/2/6/132681670/zodigufarow_jalerili.pdfIn PDF document text
    • http://files.amadorspanish.com/uploads/1/3/0/9/130969558/lonanife.pdfIn PDF document text
    • http://files.ontrackracingtours.com/uploads/1/3/1/0/131070212/6347483.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/f8837f3a-b0c8-4932-96fe-e07992eed8e3/kizosuduxegugobinix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696db8bb-5225-408f-b4f2-1343bba2279f/24511753182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7806a9fa-e18e-4130-81aa-e8b9d76df7df/wemagid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f842a6-f066-485e-996f-5fa0d16706f6/30975524825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c31471e-9280-46ab-b4a4-aa12e935fd48/91530867818.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_off0000736a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736A 5200 bytes
SHA-256: 9ae9804f6d40850991ad4dc24aa22f674aa226f8bd22c5bf2342b1361c305f3c
font_01_sfnt_off00008545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8545 10580 bytes
SHA-256: 1b4379d14d916c076c3636b68911c982141ee7aaadfc5975be555b18de401322

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