Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f616ef08cc10e7…

MALICIOUS

PDF

37.8 KB Created: 2020-10-19 10:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9ba8c63b6e307774d8780e9365970a91 SHA-1: 129df3280873396b90bf8b746630e8b647462ace SHA-256: 83f616ef08cc10e7a08b9fa55e0c301ae0782b7d407fd1d08ebe10db2898173d
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=guinness+glasses+uk In PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/polajo-xedefojam-sadomafuziguta.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/9136578.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/tukoraki_fusuxiwepu_pozomosazoleni.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/74ae5439bbe84.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/bijuloribo-tuvevomunalet-didozopoj.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/8138098.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/kamonaxa_domivejibiji.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/xirebakuxevafetesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5f8cb6a93a252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f8b3a5dcd119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5f8be689823d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8742105ce30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f8a7480ea82d.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/e318676b-3dc8-4f02-b887-7f6f1036f08b/76990735452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ccde59-6a11-4436-b2af-1d2168274d17/88326512018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3777/3983/files/59240764214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1917/2002/files/xajasefuxaligepofojiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8971/4080/files/warhammer_40k_gladius_guide.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_off0000566b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x566B 4852 bytes
SHA-256: 8d6ec79f3002e6f8144dcf049c3eb97941b5ea46227b3f5eb3721e472a48dacd
font_01_sfnt_off00006707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 10352 bytes
SHA-256: cb741ae776e0ffde9f0fcfc6003b9d1326e3c3b4673fd07e4e9a3b1afd40a428