Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe39f95813d5c5a…

MALICIOUS

PDF

42.4 KB Created: 2020-10-05 04:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85277f159fc04782d2684f6319d9619e SHA-1: a69e4808a34e9d28bb99eb1c2ff92e630e839da0 SHA-256: 7fe39f95813d5c5aac4981ab0db2f14ab111db34ac303d3848f5dfec59549fa9
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://gettraff.ru/strik?keyword=historia+original+de+la+bella+durmiente+pdf In PDF document text
    • http://files.swedetroit.org/uploads/1/3/1/3/131382680/menifupejaraxenok.pdfIn PDF document text
    • http://files.sustus.com/uploads/1/3/0/8/130874076/9682151.pdfIn PDF document text
    • http://foxedume.northshoremandarin.com/uploads/1/3/1/0/131070374/9331187.pdfIn PDF document text
    • http://porofe.gavinwelshfarriery.co.nz/uploads/1/3/0/9/130969754/1179585.pdfIn PDF document text
    • http://files.texashollandlops.com/uploads/1/3/1/3/131379371/7953459.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/74727299244.pdfIn PDF document text
    • https://site-1038693.mozfiles.com/files/1038693/batujabisobemunik.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/tidizemesekamifolujus.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/mejoxexopupitipeviz.pdfIn PDF document text
    • https://site-1036756.mozfiles.com/files/1036756/69290977289.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/77f71850-f44b-4108-bd57-4a413e954d2b/fugamosetajidekerutenuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1623f306-b0d2-4d54-9f79-7f0004bef39d/dutesogoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fb39c9-b601-4de5-bdf2-6fa16608b8b9/75760403968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96d2100-91ed-46e3-b588-fd918a251689/tofukawavulitotisalajover.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_off000063f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 5464 bytes
SHA-256: 1b0246afbcc23e43ee2504f58c72797fc0e8d5be638b48cdb0cc7cb64ea6dfff
font_01_sfnt_off00007669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7669 11240 bytes
SHA-256: bfbd8816b220ebd917dbef2d5ffbbbbaf8dee04c358d11eb9eb3fa43b43abf63

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