Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc12960f50c015a…

MALICIOUS

PDF

41.9 KB Created: 2020-10-02 10:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d6fe0d19e842bb0e04face1f545548b5 SHA-1: 66058d3e56cdb61755e9144b69883759cb2e526a SHA-256: 8fc12960f50c015a3016951f0ad71eeb4b33aa300b8166a6aeb38349aab714d7
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://cctraff.ru/strik?keyword=samkhya+karika+pdf+deutsch In PDF document text
    • http://depofonex.neeleyandneeley.com/uploads/1/3/2/8/132814930/xaxujagef.pdfIn PDF document text
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdfIn PDF document text
    • http://files.katwalla.com/uploads/1/3/1/0/131070284/momesusegulores-kiwoxobu.pdfIn PDF document text
    • http://bukone.childrensbridgefoundation.com/uploads/1/3/2/7/132710621/navixewopuf.pdfIn PDF document text
    • http://totuza.afged12.org/uploads/1/3/1/4/131406695/491329.pdfIn PDF document text
    • http://nudorejav.trojerestaurant.com/uploads/1/3/1/3/131383434/vuwotagaridefo.pdfIn PDF document text
    • http://wogofi.leegroszracing.com/uploads/1/3/1/3/131383042/fomezujeba.pdfIn PDF document text
    • http://fujosoxa.thealmostblog.com/uploads/1/3/1/6/131637308/bc2bf5a47ec4f8.pdfIn PDF document text
    • http://xesejetoj.stjohnslutheran-tecumseh.com/uploads/1/3/1/4/131438096/64d7d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8447/1719/files/kinh_tin_knh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7105/7319/files/baptist_church_governance_models.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7098/8964/files/catapult_or_trebuchet.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_off0000650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 5632 bytes
SHA-256: 529251194572e665b1b4991872a928c2145e0e623523c41355ef5857ee02e92d
font_01_sfnt_off00007817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7817 10556 bytes
SHA-256: 233e7708238d4c088c23213ad711a7f07b25077eaef925da0fab1a4664e3d2b1