Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fc86ae436887b4…

MALICIOUS

PDF

70.1 KB Created: 2021-04-02 05:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2193f3a02d148b21f048812cf567f63 SHA-1: 4a2cffb4d39c3767a80424be8bd6d96703a50036 SHA-256: d2fc86ae436887b4d3de2077465934bcbf2f0940e701060064ebe31266762752
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a resource that is likely malicious, as indicated by ClamAV detection and ML classification. The document body, though heavily obfuscated, suggests a lure for a free PDF download, which is a common phishing tactic. The presence of an external URI heuristic further supports the malicious intent of contacting an external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=dig+your+well+before+you%2527re+thirsty+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4480755/normal_605e07ce34777.pdf
    • https://cdn.sqhk.co/dederubap/hbSwmjb/xagagunizitow.pdf
    • https://cdn-cms.f-static.net/uploads/4386087/normal_6035aad862b31.pdf
    • https://cdn-cms.f-static.net/uploads/4495839/normal_600d90eeac1e6.pdf
    • https://cdn-cms.f-static.net/uploads/4450721/normal_60661f9865109.pdf
    • http://vash-fasad.live/freaky_horror_clown_creepy_mystery_town_adventuresfu00h.pdf
    • https://cdn.sqhk.co/xanovika/Lhbiegf/does_monkey_shoulder_make_bourbon.pdf
    • https://cdn.sqhk.co/puvegipuros/gjhhnif/32574456446.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://derilezin.sportsontheweb.net/princpios_da_administrao_pblica_estratgia_concursos.pdf
    • https://cdn.sqhk.co/favosejo/Kif8i0W/87582315562.pdf
    • https://cdn.sqhk.co/toromerepowa/vhH35hc/car_driving_ferrari_simulator_download_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4427538/normal_5ffabd79b18b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fiforeru.atwebpages.com/good_architecture_portfolio_examples.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/james_hardie_fibre_cement_sheet_sizes.pdf
    • https://s3.amazonaws.com/juvetaso/lagato.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_off0000d2cf.bin
ba8418cdacd28c064d7740b12146d457e2a4d26139c2c094035c901c662d7c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CF 5668 bytes
font_01_sfnt_off0000e631.bin
fab2513f769c0d1c38706ed859e5e1ef735ccb4bf66651168527bdc09f059c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 11268 bytes

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