Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fa2a01ecd58ca4…

MALICIOUS

PDF

38.3 KB Created: 2020-10-07 09:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d8d6edde91bd781370c365bc8359485a SHA-1: 054e60091fbb9a8781a856586fae76d24f1df34d SHA-256: 98fa2a01ecd58ca4b87081aee0fd63b1ea354a956fb8ccefba000c71501ced5d
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://ggtraff.ru/strik?keyword=examen+lengua+castellana+2+primaria+santillana In PDF document text
    • http://files.annmariedonnelly.com/uploads/1/3/2/6/132682819/1237179.pdfIn PDF document text
    • http://files.carlosalfredojr.com/uploads/1/3/1/3/131381036/16807965.pdfIn PDF document text
    • http://dosizemen.cmacomputers.ca/uploads/1/3/1/8/131856040/tekoremupokesom-ponokitisuramu-lugomorimufi-nexawox.pdfIn PDF document text
    • http://setun.shopvelvetmesquite.com/uploads/1/3/1/8/131856723/wonob.pdfIn PDF document text
    • http://files.movingintune.com/uploads/1/3/1/8/131856919/5146031.pdfIn PDF document text
    • http://files.thewellwithinus.com/uploads/1/3/0/8/130874278/5991433.pdfIn PDF document text
    • http://dinafeve.antioch-vb.com/uploads/1/3/2/6/132695569/4964465.pdfIn PDF document text
    • https://site-1042556.mozfiles.com/files/1042556/57319498507.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/detuwizuxutopulitabi.pdfIn PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/82953393072.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/ef3a75b6-52a8-48fc-bdc9-117819317edf/sutuxita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad68439-6191-4639-9479-fda6286ff061/12175821205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a56d3ce-f04e-4cc9-9266-1326fa98ec05/punajabubiwamitaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/565ceab2-b87d-4b5c-8365-ba25d196b6ba/fimibebiditosun.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_off00005856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5856 5412 bytes
SHA-256: 99bdcfb011ab4eca996057bb5678497265de196919eb22cb9cd177bc574e5608
font_01_sfnt_off00006ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB4 10204 bytes
SHA-256: dc9c6851c4515e7d280ba1fedbb5356874d461b57adc16c48b2c7327769d0253