Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d43d6f023c8a12…

MALICIOUS

PDF

52.2 KB Created: 2020-10-10 08:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7c6556284e1be59901ff8df79e37e205 SHA-1: 5ca3e6d917b619f1db7406017a679eb929338986 SHA-256: 53d43d6f023c8a124e0c42c58e7958745ad4c49f1958c3e51edc5441d297c488
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=ap+environmental+science+practice+exam+2020 In PDF document text
    • http://fubujot.havstrutarna.org/uploads/1/3/1/3/131379945/mupibenadovevo.pdfIn PDF document text
    • http://puzumatut.oakfurnitureyorkshire.com/uploads/1/3/0/7/130739069/gigorelidenedat_zafojed_kazowawed.pdfIn PDF document text
    • http://banib.michelleboyd.net/uploads/1/3/0/7/130739616/847ab1f7.pdfIn PDF document text
    • http://zakoviko.wilsonracingesports.co.uk/uploads/1/3/0/8/130873949/9391085.pdfIn PDF document text
    • http://jivamebuz.totallywonderfuel.co.uk/uploads/1/3/1/4/131408024/wukozixoxok.pdfIn PDF document text
    • https://site-1041206.mozfiles.com/files/1041206/13343621737.pdfIn PDF document text
    • https://site-1037856.mozfiles.com/files/1037856/31381936480.pdfIn PDF document text
    • https://site-1043939.mozfiles.com/files/1043939/wixigitizumujidisu.pdfIn PDF document text
    • https://site-1036930.mozfiles.com/files/1036930/roresokebimaw.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/a9b3be3e-97b1-4705-ac1b-277e7426e2f0/tilivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8ab4fd-756a-46b0-bb96-84e26807db53/zisejigufujodofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd98dbc-5a2a-41b5-976a-6034db8e9959/muvaguxirebakowirab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be95c29-2cf2-4cf1-aac7-4b9147f1c6cc/pafewirobigoguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02844ae7-9068-4d63-a1c8-bd76a978b78c/vogiritonan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c713543-ce83-418e-9bfd-7f9fda0b0e05/morogosezurasosotezizeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c42aee-f634-4e19-9a5a-2115dde897a1/fuzowategodivotizijiradi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8A 5256 bytes
SHA-256: 0dad2af8b174fd48fbd8267d4b39889c49632eb7b0ca4f6f473c890858731c57
font_01_sfnt_off00009144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9144 10672 bytes
SHA-256: 192d2a3f9a328bc4fcb0ba3f8660220d0546f48a06f40213fddc0d084515e161
font_02_sfnt_off0000b571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB571 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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