Malicious PDF — malware analysis report

Static analysis result for SHA-256 e924885d538ba176…

MALICIOUS

PDF

65.9 KB Created: 2021-02-27 07:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a92c89911bc60b512a4574cbcad2f502 SHA-1: 361957218b7d66a7e189b6e28e2263690a09cab3 SHA-256: e924885d538ba176aa1ee0a4c79822324758efcca414eeb1b55bcc3d9a49c08c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to 'golowaki.ru', suggesting an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to 'Sports Illustrated release dates 2020', likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=sports+illustrated+release+dates+2020 PDF link annotation
    • https://cdn.sqhk.co/zukuxenopo/hjagdo0/82906149809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483070/normal_5fda6721cce0c.pdfIn PDF document text
    • https://wujuzuvetawi.weebly.com/uploads/1/3/1/3/131379059/8c213f14.pdfIn PDF document text
    • https://xodumusekow.weebly.com/uploads/1/3/4/7/134708755/f3ddaf9c9a.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/waravusuvobuboxezoxeta.pdfIn PDF document text
    • http://bokubewere.22web.org/32358501598.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/1035241.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/cqyjigI/ritatiseloxilej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_60247414c4bda.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/semeju.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/how_to_clean_ratchet_straps_by_dirt_farmer_jay.pdfIn PDF document text
    • https://cdn.sqhk.co/nefikelifu/hhbridg/xilimov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kizarepopudoso.epizy.com/fugexufidijuxopewejesome.pdfIn PDF document text
    • http://gogamezotuzapop.epizy.com/67086778864.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/wojivegukasulaxasuxelog.pdfIn PDF document text
    • http://wefazor.epizy.com/argentina_chile_copa_america_2015_formaciones.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_off0000c565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC565 5332 bytes
SHA-256: e06ffb9f76e2f297f5d2cd97950f2592796b2ff5642d935828470b91d1c18045
font_01_sfnt_off0000d78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78A 10236 bytes
SHA-256: 6dbc4d820ed73eae02a4a733337149dec0ce9ca81119b3dce3544b80a47401e5

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