Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f88db014e6eb5a0…

MALICIOUS

PDF

71.7 KB Created: 2021-02-08 22:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2a692bd6270daf70eb4a59a1ce891fcf SHA-1: 0b01e0ff03055dfdc1fff4505db6e02034ddbf89 SHA-256: 9f88db014e6eb5a00d3319111322513aaa92bacf9b3f9fea4c4599f8ad8e9cb2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/aws?utm_term=written+business+plan+in+ethiopia+pdf PDF link annotation
    • https://vojitimene.weebly.com/uploads/1/3/4/5/134596684/1016077.pdfIn PDF document text
    • http://ita-bio.fun/gukegpyvn6.pdfIn PDF document text
    • https://movimuwetimegi.weebly.com/uploads/1/3/4/3/134342740/lixubakivin.pdfIn PDF document text
    • http://hookup750.website/the_cultural_landscape_12th_editionxlklm.pdfIn PDF document text
    • http://zopedefijewe.iblogger.org/39150529255.pdfIn PDF document text
    • http://winoorama.space/thai_lottery_results_chartkalyz.pdfIn PDF document text
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/selexapofojivib.pdfIn PDF document text
    • https://dosisusibifoba.weebly.com/uploads/1/3/4/2/134236234/7fc826daf2ca.pdfIn PDF document text
    • https://derivasip.weebly.com/uploads/1/3/1/4/131407068/ratos.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirolizilu/aUgdvhd/47304701745.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rubuvajaroxe.epizy.com/27017590510.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/gufovuderukadupasurapo.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/dexefepowemuwezike.pdfIn PDF document text
    • http://jufakoxageponuz.rf.gd/centrelink_form_mod_pc_private_company.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/gokuxid.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_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 5280 bytes
SHA-256: a439563a5c98a28918dcfd9b805942317aa233962cc7d350b5f3de46749029c2
font_01_sfnt_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 10556 bytes
SHA-256: 16cc468f8f577ab342a546079ac6098ceddf5e04de00480d8529ff9b60e0c9d7