Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e6700c0bcede3ad…

MALICIOUS

PDF

75.9 KB Created: 2021-05-11 23:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 020a11b108c859983f4d8a4f0d1e010a SHA-1: 517d5ea636b49d36059a2ea8a1903570ac9d1b45 SHA-256: 3e6700c0bcede3ad2083fcb302b661339925ebe78bb7d6d8e0831f7fdf9da039
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically pointing to 'https://kuzutuzo.ru/strik?utm_term=tableau+training+videos', suggesting a phishing or scam campaign disguised as training material. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the classification as a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=tableau+training+videos
    • https://cdn-cms.f-static.net/uploads/4502870/normal_5fe7f7ff382e5.pdf
    • https://cdn-cms.f-static.net/uploads/4461245/normal_601d6a0612a26.pdf
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/vulura_jewig_dopamovawubako.pdf
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/rizemowene-bezuk-jagimar-zawizonefili.pdf
    • https://doxeraja.weebly.com/uploads/1/3/1/8/131871607/ba3009373c.pdf
    • https://cdn-cms.f-static.net/uploads/4481663/normal_6037105cd8a8e.pdf
    • https://cdn-cms.f-static.net/uploads/4408989/normal_600f5fb1e1a0b.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_602f5fdfe4c6e.pdf
    • https://cdn-cms.f-static.net/uploads/4428335/normal_603e3cb12999d.pdf
    • http://barojenixumaja.iblogger.org/how_to_connect_brother_wifi_printer_to_ipad.pdf
    • http://latitekiwa.scienceontheweb.net/ashrae_hvac_standards.pdf
    • http://wozilimesiz.mypressonline.com/hodgdon_superformance_load_data_270_win.pdf
    • https://zoxujaratufopa.weebly.com/uploads/1/3/5/3/135399722/d250c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rukawinasi.rf.gd/bofibuxujotegenugani.pdf
    • https://s3.amazonaws.com/rodigapigeta/gewomogenuzelenizu.pdf
    • https://s3.amazonaws.com/wutogugej/ccna_chapter_2_quiz_answers.pdf
    • http://pevogikuxupeja.onlinewebshop.net/the_end_of_eva_explained.pdf
    • http://lufopudizomuv.atwebpages.com/donobugewizoxubirusijaruv.pdf
    • https://s3.amazonaws.com/mojivikapeti/xugixedinipe.pdf
    • https://s3.amazonaws.com/seriposuj/mimiwi.pdf
    • https://s3.amazonaws.com/mekonulegipero/world_human_development_report_2017.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec39.bin
9f50ae1eb1c84230c0c2bf920f8b3d2ad57492f028ab1a02a2072e29542bf3b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 5144 bytes
font_01_sfnt_off0000fdc5.bin
85d3b8536cda0b6ceafeb802bfb386172cb059d565e3d9d423b03914989e40f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 10736 bytes

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