Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c357f8161b2776c…

MALICIOUS

PDF

44.9 KB Created: 2020-10-01 14:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 978047d64b3a41e28b112be36fbbcf10 SHA-1: 675a648c4a0c93423e44c55b5c07624105c884d5 SHA-256: 4c357f8161b2776c738f3676c079f71f6a83c84e2e500326820a5cbdf9413359
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=the+economist+november+3+2018+pdf In PDF document text
    • http://files.carraracafesg.com/uploads/1/3/1/3/131379510/2821503.pdfIn PDF document text
    • http://files.dandridgesafaris.com/uploads/1/3/1/1/131163851/bovizukawonupuli.pdfIn PDF document text
    • http://files.neurokitchen.org/uploads/1/3/1/1/131164095/vufuzujo-lenurexukalo-faxabodaz.pdfIn PDF document text
    • http://files.phisterequipment.com/uploads/1/3/1/4/131408328/vazamoradaluno-fenad-kopowafeto-govorila.pdfIn PDF document text
    • http://files.downsizefarm.com/uploads/1/3/1/6/131606284/veseze-vaxidimebisam.pdfIn PDF document text
    • http://xagalop.bekindtoeverykind.com/uploads/1/3/1/0/131070302/nibafofitogeb.pdfIn PDF document text
    • http://moxos.bolivargolfclub.com/uploads/1/3/0/7/130739919/faxamaza.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/69494215591.pdfIn PDF document text
    • https://site-1039633.mozfiles.com/files/1039633/furorenuxejedimatubuzob.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/52478191472.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/lufonugo.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/zalojejuxewitix.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/8984c2ad-2cbf-465e-8a25-a3def06b45eb/matulebewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c21530-9bc3-4deb-a09a-551331608b82/manaxuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2480a4-ca4d-4647-8e75-1835f487affd/7853475770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9850b20-2c2e-4f9e-b495-504938c8968c/mimosoxatuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0513d5eb-ca7c-4af0-9cb6-fbbb083a24d2/zopobekarefakedume.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3E 5984 bytes
SHA-256: faabaa542696a3b4f8784111e7214fae4d2660db4c55933151e5a7c25aa77ec7
font_01_sfnt_off00008282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8282 10616 bytes
SHA-256: 9de4ed7ae8db9e55480da7e6f40e3e4f62034efca5c8b5659dc0c00d386097f8

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