Malicious PDF — malware analysis report

Static analysis result for SHA-256 471faa74e56d3c08…

MALICIOUS

PDF

69.3 KB Created: 2021-03-02 21:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 382a93a3578ae007f623c765e816158f SHA-1: c639f2831de3a4b4140d73ce19380c72e775f842 SHA-256: 471faa74e56d3c081196dfb822e4cfeeb2dc964b296dcb1b00b83f750efcec79
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=eheim+fish+feeder+programming PDF link annotation
    • https://wuneregogituweg.weebly.com/uploads/1/3/4/6/134686440/e671e6c57e.pdfIn PDF document text
    • http://voxemukam.22web.org/falimunipixipew.pdfIn PDF document text
    • https://katozela.weebly.com/uploads/1/3/0/8/130874493/lisase_debipero_foxavadugal_pufefadin.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/mavowaniloxure.pdfIn PDF document text
    • https://jowiginuzag.weebly.com/uploads/1/3/1/4/131438641/jasow.pdfIn PDF document text
    • https://vafarisitoguv.weebly.com/uploads/1/3/0/8/130874489/7784777.pdfIn PDF document text
    • https://nanerofe.weebly.com/uploads/1/3/4/3/134312873/178073.pdfIn PDF document text
    • https://gemaxapofa.weebly.com/uploads/1/3/2/6/132681544/6103405.pdfIn PDF document text
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/xamivokozivuji.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/1634400.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/dutijep-nakowurexipites.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/gozifep/judulipomavokakazifaruw.pdfIn PDF document text
    • http://lusuzajemofim.rf.gd/fufuzesewawagefegikawa.pdfIn PDF document text
    • http://baxodivol.rf.gd/cae_exam_vocabulary.pdfIn PDF document text
    • http://lurivukilurufex.epizy.com/wububofe.pdfIn PDF document text
    • http://baxudamotis.rf.gd/vsco_full_pack_mod_apk.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_off0000d359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD359 5380 bytes
SHA-256: 7415b71574346d628d0787617317746137f1dc96d80b64e681f1d1a163a25d9d
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 10132 bytes
SHA-256: 0920c6f4ee3477f4ca9b70249b1955115ace541a07d00762bdf20b5a0a2edf46