Malicious PDF — malware analysis report

Static analysis result for SHA-256 50761e433232588e…

MALICIOUS

PDF

42.1 KB Created: 2020-10-07 23:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b829ea3badddf27da4868134278fe445 SHA-1: 651dbd95577b27c6a92ab1212f2b6f69546e2276 SHA-256: 50761e433232588e7580b095fb409b6db87760a7beaca4587fbedfe261759ed0
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=dead+rising+4+collectibles In PDF document text
    • http://files.cowen.rocks/uploads/1/3/0/8/130874691/mameridiwup_depaw_bisubapi_rajupimuvito.pdfIn PDF document text
    • http://files.rebeccalynnjewellery.com/uploads/1/3/0/7/130739404/3878863.pdfIn PDF document text
    • http://files.matsusokankarate.org/uploads/1/3/1/3/131398322/342505ee2b.pdfIn PDF document text
    • http://mezuvej.cbcasheville.org/uploads/1/3/0/8/130815582/japatena.pdfIn PDF document text
    • http://files.defianceswcd.org/uploads/1/3/1/3/131384568/1629252.pdfIn PDF document text
    • http://xizew.renosonsofitaly.org/uploads/1/3/1/3/131382028/najizirunijubawana.pdfIn PDF document text
    • http://files.bullfrogandichingbeads.com/uploads/1/3/1/6/131606672/3682103.pdfIn PDF document text
    • http://files.bcaprastudioarts.com/uploads/1/3/0/9/130969002/7163691.pdfIn PDF document text
    • http://files.forevermiafoundation.org/uploads/1/3/0/8/130873945/toxopav_derepowini_lofagufig.pdfIn PDF document text
    • http://nugavadab.carolconnor.net/uploads/1/3/2/6/132696056/kodekapimofi-katekogiriru-nobexezeges-vutosetevum.pdfIn PDF document text
    • http://ziwif.fitintegrity.com/uploads/1/3/1/8/131856476/ab09eb977.pdfIn PDF document text
    • http://poremo.trulytied.com/uploads/1/3/1/4/131406557/rukiwek-nebufe-ledode.pdfIn PDF document text
    • http://files.dianartist.com/uploads/1/3/0/7/130740490/davadobazal-xekalusovu-litab.pdfIn PDF document text
    • http://beruk.backnbalance.org/uploads/1/3/2/8/132816165/kamixosumi.pdfIn PDF document text
    • http://files.rudymareelphotography.com/uploads/1/3/1/4/131412181/vitobuga-fimemev-wozifol.pdfIn PDF document text
    • http://relafub.saledomesticappliances.co.uk/uploads/1/3/1/3/131383483/3206434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 5332 bytes
SHA-256: 761f90846c000a83c41422f5473feca14b235391ae7154fac3c9b0de73a72037
font_01_sfnt_off00007951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7951 10084 bytes
SHA-256: f4829ff8f8f816c4dd342b95d9cf41ccc9bb2e3750a42cdfa56af991f2a8bd16