Malicious PDF — malware analysis report

Static analysis result for SHA-256 a331faeb165c5dbf…

MALICIOUS

PDF

77.6 KB Created: 2021-02-06 04:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: affe4ed56503bc45ca76af3054e58d5e SHA-1: 91db4244fd84a6e1f962f1cf82cb389461752c11 SHA-256: a331faeb165c5dbf5d404102c56a3fdb6d4b12a7069e176c742948989fc73603
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wb?keyword=bhagavad%20gita%20srila%20prabhupada%20pdf PDF link annotation
    • https://wonulabanasilod.weebly.com/uploads/1/3/1/4/131482851/diloxum.pdfIn PDF document text
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/sawure.pdfIn PDF document text
    • https://lekipavovat.weebly.com/uploads/1/3/4/3/134332936/8651194.pdfIn PDF document text
    • http://kvyovk.xyz/ssc_stenographer_english_book_dodirzp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413718/normal_5ff28c70b873a.pdfIn PDF document text
    • http://xikupolabije.22web.org/risezevavij.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/c58a4.pdfIn PDF document text
    • http://bonapimum.iblogger.org/cbs_channel_2_chicago_reporters.pdfIn PDF document text
    • https://piwetidij.weebly.com/uploads/1/3/2/3/132303123/20e65f6a456.pdfIn PDF document text
    • http://begemot.space/mi_album_preescolar_segundo_grado_20pk3l6.pdfIn PDF document text
    • https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/zepuwu.pdfIn PDF document text
    • http://azorocheat5.xyz/unlimited_high_speed_internet_service4t0gj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/51987380058.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/37088504632.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/chemistry_edexcel_igcse_textbook_answers.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_off0000f07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 5552 bytes
SHA-256: c3e55b5f73d05f2e0b4666b858f0228f5a0c7d577d6f157ea97378f3bd463301
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 11524 bytes
SHA-256: 8c705a7bff9ee5666c084af48effaf071ab4f772b9f29f16664fa9416b5d79e7