Malicious PDF — malware analysis report

Static analysis result for SHA-256 112a780ffed0d3b4…

MALICIOUS

PDF

41.9 KB Created: 2020-11-08 12:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 1ae7249dcfb65b912a68244493057f5b SHA-1: a295849fc4cbdae7c9eefa13ffb85041cc55fc19 SHA-256: 112a780ffed0d3b42e26ed44c09c16b3f0754bcfc1d5ecc2a33b950a77ad65a3
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/aws?keyword=mostfungames.com+mahjong+games PDF link annotation
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/92fff09b7fbc15.pdfIn PDF document text
    • https://gerexogevi.weebly.com/uploads/1/3/4/4/134463414/miwidodedeba.pdfIn PDF document text
    • https://gefeteki.weebly.com/uploads/1/3/4/3/134310298/mijuvojalo_gekewevezavuxa_kinekoda.pdfIn PDF document text
    • https://ladofozaser.weebly.com/uploads/1/3/4/3/134334290/1969539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fa1721d88571.pdfIn PDF document text
    • https://zenefuzivoxog.weebly.com/uploads/1/3/4/1/134108933/fokopemax-kememife-gipujuludugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5f88a0ca5edcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://subonurage.files.wordpress.com/2020/11/7122347985.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/74373542057.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/gen_brca1_y_brca2.pdfIn PDF document text
    • https://kumapimu.files.wordpress.com/2020/11/telecommande_freebox_mini_4k_ne_clignote_pas.pdfIn PDF document text
    • https://nojalubedu.files.wordpress.com/2020/11/billige_engros_bulk_smykker.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_off000064cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 5280 bytes
SHA-256: 0bca19253b352e165dbec25c647c7cf6c66f56f6a7e96ba57346758ec6955ba2
font_01_sfnt_off000076bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BF 10716 bytes
SHA-256: 2d97731c522370fca903ab957277df5077a4347066d98271e0252d5545a786ea