Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d1401677f9cb42…

MALICIOUS

PDF

74.9 KB Created: 2021-02-27 12:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c55fa30a8bdc7dd4ebacff401502ff3c SHA-1: 120ae1425bf82a2511a28373b778f8c104f096f3 SHA-256: b1d1401677f9cb429604e951fd9c9d1ddb5815d84ed26d421b93c5ce1f36748c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('mezovuduw.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://mezovuduw.ru/strik?utm_term=bosch+silence+plus+48+dba+owners+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5ff53624b5ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_603498dfcfd23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414688/normal_5fcef592ceb38.pdfIn PDF document text
    • http://wigigokewadusad.iblogger.org/mitivavadinatazaz.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/sajobuparulipupefipapelux9rlc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_6011c3d1dfd05.pdfIn PDF document text
    • http://prod-fruit.space/electronics_all-in-one_for_dummiesia0eu.pdfIn PDF document text
    • http://savadaqwe.space/87991357411wouru.pdfIn PDF document text
    • http://tonagruz.ru/mcse_certification_syllabus_2016k5f3h.pdfIn PDF document text
    • http://jobipelulimobo.iblogger.org/70261020328.pdfIn PDF document text
    • https://cdn.sqhk.co/bokapapukopa/aMToDgc/best_90s_rock_songs_playlist.pdfIn PDF document text
    • http://walletelectrum.buzz/what_is_it_called_when_you_are_always_stressedu0wu9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_602febc25e6eb.pdfIn PDF document text
    • http://bilapak.66ghz.com/sopet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tufuripisaren.epizy.com/49690685505.pdfIn PDF document text
    • http://gebusibe.rf.gd/how_the_grinch_stole_christmas_movie_quotes.pdfIn PDF document text
    • http://xewenofos.epizy.com/incomplete_dominance_practice_problems_answer_key.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF13 5676 bytes
SHA-256: 25827bd8c76615c5a8642dca3634ef49718b503c3b952ac544ff7bcd454a97e7
font_01_sfnt_off0000e226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE226 2116 bytes
SHA-256: 991f7ef292b59849fa1804c361c52a6255426db797fbcab3b5d31d1f34ee76c9
font_02_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 10572 bytes
SHA-256: b310e129a43d029766efd97ad66b28d0b9d78da8a40a44c5c881227a85ed143d
font_03_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.