Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af82c6720f8e051…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 02:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fab7d7d613431aeda40b853359962e84 SHA-1: 2a26e21431841067b2db07d8791f77db60dc32b8 SHA-256: 7af82c6720f8e05184ab72ec553764879bc4a119ba88955783406d30cd79d951
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting redirector patterns, strongly suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to malicious content, likely for credential harvesting or further payload delivery.

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://xajibur.ru/strik?utm_term=marantz+professional+pmd-300cp+specs PDF link annotation
    • http://game-pro.xyz/243575238156xmzd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_600fd84624d99.pdfIn PDF document text
    • http://pushbiz.fun/brother_printer_mfc-7840w_drum_end_soonp7zm7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_60489637a362a.pdfIn PDF document text
    • https://dojovirofolabi.weebly.com/uploads/1/3/1/0/131069789/lisuwoxilorevogadugu.pdfIn PDF document text
    • https://futibiwis.weebly.com/uploads/1/3/1/4/131408183/bilenugi-tiluguximiju.pdfIn PDF document text
    • https://vesifumami.weebly.com/uploads/1/3/5/2/135294942/212980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498883/normal_60478cca1dc6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_6014272fc4c9a.pdfIn PDF document text
    • http://pshcomonhere.xyz/34327899159vh2ww.pdfIn PDF document text
    • https://javexediwoxi.weebly.com/uploads/1/3/4/5/134584379/6009853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451970/normal_5fe3d575ee77e.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/bolexutibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eada8da-9dd5-4a78-b24e-d0aa89574167/what_is_the_best_graphic_design_app.pdfIn PDF document text
    • http://vetemux.epizy.com/earl_nightingale_think_and_grow_rich_condensed.pdfIn PDF document text
    • http://barukes.epizy.com/half_tire_flip_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0377186b-6853-4423-93d0-433d7ccd3424/brown_bear_brown_bear_coloring_book.pdfIn PDF document text
    • http://todabopojexojad.epizy.com/dowry_prohibition_act_in_malayalam.pdfIn PDF document text
    • http://lewinozed.atwebpages.com/introducing_second_language_acquisition_perspectives_and_practices.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/effective_c_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2b8899-c51d-48c8-98a7-0985a868f4b8/xerekapud.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_off00010900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10900 5692 bytes
SHA-256: 0f61dce30c403bed877a4c95bf22cf06181acd4c16fed65c89feb2962cb18451
font_01_sfnt_off00011c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 11808 bytes
SHA-256: 8fcf584ff80971d90d65501d82eb6fab98c6de5a63219854016ca495392f58ab

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