Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f41732d3c292e61…

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 19:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e013b26fa3900de6b9822c05a508d533 SHA-1: 493597947a46ec4e9afd341928295b0fd5266fd2 SHA-256: 9f41732d3c292e615d70c607c05ab9534b4a5fe1c0728653b246ca267b77075e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to product information, directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=zoom+h4n+pro+battery+life+phantom+power PDF link annotation
    • https://rapaxexujimina.weebly.com/uploads/1/3/1/4/131454932/c47b2e670c8.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/mimivedo_sajoledifa_kogapo_rewamilam.pdfIn PDF document text
    • https://pevopuxavinedun.weebly.com/uploads/1/3/1/4/131406680/wabotaxokewakof.pdfIn PDF document text
    • http://fizolewafivemis.22web.org/how_to_put_a_vinyl_decal_on_a_tumbler.pdfIn PDF document text
    • http://dugipoxumiku.iblogger.org/renepatovisulategavela.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474450/normal_5ffefd0b236ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_602fa4d3aaf92.pdfIn PDF document text
    • http://fukikenikiru.22web.org/dekatasebukaluropolaba.pdfIn PDF document text
    • http://dubifuxukev.iblogger.org/linksys_e1200_router_review.pdfIn PDF document text
    • http://gadokuzepot.22web.org/charge_of_the_light_brigade_poem_form.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/tikoweravisixu/austro_hungarian_uniforms_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/grammar_checker_english_free.pdfIn PDF document text
    • http://nogubas.rf.gd/nedavu.pdfIn PDF document text
    • http://toxuwer.epizy.com/emergency_phone_numbers_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/lopajesaw.pdfIn PDF document text
    • http://dagajevefud.epizy.com/85000975755.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/fagobekomubinumozevera.pdfIn PDF document text
    • http://kiwizenodemi.epizy.com/memiti.pdfIn PDF document text
    • http://serefelotu.epizy.com/pivomukabedigi.pdfIn PDF document text
    • http://kiwivesunita.epizy.com/fovif.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_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 5340 bytes
SHA-256: 0e043b38638b89602d8a687e5aebb337bfb29d1f61e2bb412274154f4e20c45a
font_01_sfnt_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 11184 bytes
SHA-256: 3461175d822d24c78805cdfa80a8dd8c51c2c387c1a0805091c15795b1732131

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