Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fc8cb71d70caa7…

MALICIOUS

PDF

76.3 KB Created: 2021-03-16 18:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 497737151fe94d5c049ad8bf90ef50ac SHA-1: 75c495b2ef1643c752549508508b05cac2517a2f SHA-256: 54fc8cb71d70caa7f000cb69e9f7ec38b6098d9810c2b80dd576992830a747d7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the document's deceptive content suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=halo+piano+chords+pdf
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/8558100.pdf
    • https://salufisudad.weebly.com/uploads/1/3/2/6/132695294/duxozogasipudav-fupuru.pdf
    • http://instacopyrighthelpteam.com/vofejevqjx1r.pdf
    • https://cdn.sqhk.co/bovutolomevo/vx3hiwf/51713619844.pdf
    • https://cdn-cms.f-static.net/uploads/4403822/normal_6017a4e607dbe.pdf
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/3a355.pdf
    • https://cdn.sqhk.co/zesonixiv/ljaZ2gg/cookie_clicker_cheats_opensesame.pdf
    • https://static.s123-cdn-static.com/uploads/4370309/normal_5fc90758a8d9c.pdf
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/9099649.pdf
    • http://vugekowuzujed.scienceontheweb.net/27935814307.pdf
    • http://taptopbot.com/how_old_is_vesemir6qjaj.pdf
    • https://cdn.sqhk.co/kezixowog/gjgfgic/70182166817.pdf
    • https://cdn.sqhk.co/jebumujo/mjaoggE/lokujugiwof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mekasesajiw.onlinewebshop.net/zizevekuguxitowebavifimir.pdf
    • https://s3.amazonaws.com/nojemi/jubefufopide.pdf
    • https://s3.amazonaws.com/tojabixefova/blue_iris_flower_drawing.pdf
    • http://zuvuzevo.atwebpages.com/artificial_intelligence_techniques_textbook.pdf
    • https://s3.amazonaws.com/jupevuxirapi/video_show_mod_premium_apk.pdf
    • https://s3.amazonaws.com/kudefem/ypsilanti_township_police_reports.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f421.bin
2c9bbc23190fab529024be8d786d989135a5975e1291e008a2df2b02226eb694		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 5204 bytes
font_01_sfnt_off000105ca.bin
b65118ade010157022416b924ab2bb3a40dea146d99a3bcb9c22766d738d37be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 11024 bytes

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