Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f79cfa1ae5d363…

MALICIOUS

PDF

63.4 KB Created: 2021-02-22 13:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 843d589ae651cce69da98a629a385161 SHA-1: 3849695e0e80c3cbd09c051366721375e319582d SHA-256: 88f79cfa1ae5d36369e99132f5f498c4cea008ebf3c77f57f644ca7c6745bb90
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wix?keyword=lakewood+heater+792+recall PDF link annotation
    • https://derajuxojop.weebly.com/uploads/1/3/1/4/131452827/1683017.pdfIn PDF document text
    • https://jabudebixeref.weebly.com/uploads/1/3/4/3/134398441/fezepasa-nupokomavaf-ripijamuwozute.pdfIn PDF document text
    • http://mybiol.site/cursive_alphabet_tracing_worksheetsm5b3r.pdfIn PDF document text
    • http://goromeo.club/blessed_john_henry_newman_rc_college_uniform72i6z.pdfIn PDF document text
    • http://wordwild-store.com/mebafimelexerikomk0iy.pdfIn PDF document text
    • http://roxobupupop.22web.org/49644742490.pdfIn PDF document text
    • http://mestorating.ru/epic_games_support_number3o71m.pdfIn PDF document text
    • https://fusasevamasaxig.weebly.com/uploads/1/3/4/8/134866100/dibupopare-kiwobibukus-fubafalulewake-givipufuwuradow.pdfIn PDF document text
    • http://grenkasalo4.xyz/all_blues_transcriptionedm6d.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/4910673.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/sefukirexuwekij/keborotevujiretex.pdfIn PDF document text
    • http://jegajumofi.rf.gd/fanny_mendelssohn_string_quartet_sheet_music.pdfIn PDF document text
    • http://gurebuvijo.epizy.com/87677528799.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_off0000bbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEA 5312 bytes
SHA-256: e5c3914c794e501e694dc04eedd1755f0ceb47d894107c0344095dfd99c25322
font_01_sfnt_off0000ce1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1C 10220 bytes
SHA-256: bc5c4430a053db1652af3f3e7b721d740cdefe5f03107bb6a81eb7f0b23859ea