Malicious PDF — malware analysis report

Static analysis result for SHA-256 f527d1a39797ff22…

MALICIOUS

PDF

72.6 KB Created: 2021-03-03 05:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8f6b1fdd0cdfe5d09f6b2bac500a69a5 SHA-1: 946c2f0b99ff662f5ea84bf89c4701af4e969cff SHA-256: f527d1a39797ff225a1e3bae3f0a0735ad2979808596b60463699c06c756ef14
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=justin+guitar+beginner+songbook+volume+2 PDF link annotation
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/2786164.pdfIn PDF document text
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/2908321.pdfIn PDF document text
    • https://gawobomune.weebly.com/uploads/1/3/5/3/135317514/porebulaputupuseg.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/soleus_air_14_000_btu_portable_air_conditioner_lx-140.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/words_that_start_with_proto.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/Cojgcmn/vedigogot.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/iiifaha/nuxikasafisubumenifal.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/92081118267.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sivisalatifaba.rf.gd/76713734826.pdfIn PDF document text
    • http://kimitumepogamom.epizy.com/solvents_used_in_non_aqueous_titration.pdfIn PDF document text
    • http://daxevetefixidaj.epizy.com/mepifejup.pdfIn PDF document text
    • http://bisavosimirot.rf.gd/xaxifopa.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/the_rising_of_the_shield_hero_season_2_release_date_anime.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/descargar_la_biblia_reina_valera_1960_para_pc_windows_7.pdfIn PDF document text
    • https://www.andertons.co.uk/brands/books-and-videos/justinguitar-beginners-songbook-In 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_off0000dd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD81 5392 bytes
SHA-256: 3df2ba1778842ca819e5b517580c5685634a4b00b9e28e51f0e979015e7dc18d
font_01_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 11376 bytes
SHA-256: a1cbefac3b0662e959039e741c586fb7e4fd5ad038625070b72ee86d72a83262

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