Malicious PDF — malware analysis report

Static analysis result for SHA-256 c983be951e0ddf70…

MALICIOUS

PDF

46.4 KB Created: 2020-10-04 08:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d6c8183d71513b744eedc217249b2bad SHA-1: 345cff4966487ebb065ed4c8f70093cdcbc17d25 SHA-256: c983be951e0ddf70194ee85798ee806188948991215bd8992aaeec53e023d403
224 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=pokemon+resolute+walkthrough+downloa In PDF document text
    • http://sidebomas.nationalsocietydfpa.com/uploads/1/3/2/3/132302955/natuvewupodanize.pdfIn PDF document text
    • http://files.aprilallysonabel.com/uploads/1/3/1/3/131384127/zefelupop_dibofa_rakoluf.pdfIn PDF document text
    • http://files.justinhornback.com/uploads/1/3/1/3/131398197/6a5c27e3e315f.pdfIn PDF document text
    • https://site-1038943.mozfiles.com/files/1038943/fusirafuvefoj.pdfIn PDF document text
    • https://site-1039646.mozfiles.com/files/1039646/xizap.pdfIn PDF document text
    • https://site-1042510.mozfiles.com/files/1042510/tarewo.pdfIn PDF document text
    • https://site-1040165.mozfiles.com/files/1040165/favokasivepe.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/111d5d00-1c25-4f96-86e6-cf8a55ccba69/76456319566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29b1666-7374-4123-bad5-7d426bfa64ab/jexujiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4dbaf7-dab2-475e-8f7f-8a7442c94b85/niwanifujenipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4722/6024/files/26145246822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1519/8104/files/pifijovefuvigogo.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_off00007743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 5396 bytes
SHA-256: e057bc000b04b765b6252a13d957d73b464fa9444218118e80fbfc23b945ccb1
font_01_sfnt_off00008983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8983 10240 bytes
SHA-256: 44f7f3253c2cbbd8335899d9a361ef3a2726c37e5f0828184dd41e7e80c29a7b