Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b12ec31a2b2b6f…

MALICIOUS

PDF

74.3 KB Created: 2021-01-23 20:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 851262636021dc38c07e69ebb83f0edb SHA-1: fd785e696fae8ff9bacd23d058fec8ec98e081aa SHA-256: 34b12ec31a2b2b6f5e7bd870acaa3cb9effeb0ff59d7fed9012da38cd66a0798
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://jottigo.ru/123?utm_term=oxidation+of+pyruvate+definition PDF link annotation
    • https://site-1167927.mozfiles.com/files/1167927/fox_girl_anime_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/2ihjg7p/64349929145.pdfIn PDF document text
    • https://xarudaxukisa.weebly.com/uploads/1/3/4/0/134018653/savomezawofor.pdfIn PDF document text
    • https://pekonupag.weebly.com/uploads/1/3/2/7/132741447/3c31d.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/hgdifjg/rudeberuwolusewa.pdfIn PDF document text
    • https://sedarujewajoto.weebly.com/uploads/1/3/0/9/130968957/2274552.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/iajgBij/bebuzolesijozivurasususok.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/fhfggyc/53506096837.pdfIn PDF document text
    • https://site-1177661.mozfiles.com/files/1177661/shop_fox_wood_lathe_model_w1758.pdfIn PDF document text
    • https://vokavubibobudew.weebly.com/uploads/1/3/5/3/135316357/fc0daf2ebe592.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/8bhcYha/xejumasatataxevebogilare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sufumawug.epizy.com/chousar_firangi_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/ar_er_ir_verb_conjugation_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/wufokiwifavufotoposal.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/jemidosojetona.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_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 5084 bytes
SHA-256: 8cd035a8b13e16961bc42be428e850c776f54e227138a83e60dc82ed022cc830
font_01_sfnt_off0000f8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DD 10568 bytes
SHA-256: a4035bffcce9aabfe4973d82f8866e46b057edb5d4d3bab9a0efcde2ab85dd24