Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f1fe455236a8ad…

MALICIOUS

PDF

81.6 KB Created: 2021-03-07 17:52:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cb02955d0ec47f4c501ea1eb5ed41a97 SHA-1: b1ab84518038341b3b6b308196bcc7dd3908e240 SHA-256: 17f1fe455236a8ad9b2e0a79f6e528121e9e72312bbeb38c0734b2b6fc5d1025
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be related to product information, likely a lure to direct users to malicious URLs. No scripts were extracted, but the presence of many external links indicates a high likelihood of redirection to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=honeywell+tower+fan+replacement+remote PDF link annotation
    • https://cdn.sqhk.co/bapuwanuvadi/thRjjyU/dr_driving_2_game_download_softonic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_601a5cbc3c0c2.pdfIn PDF document text
    • https://cdn.sqhk.co/piwewupovo/UzqlLia/24227636192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5fd8b8e29585d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_6005acb0935de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_6043547ea7c00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422371/normal_601d1d7281c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_60205c76d54c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415530/normal_60046c16e401b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_882de70c065e4597a163a6d70482e141.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_a30b7d32a448413f82532ee4397ffb77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd75f0ae-25a5-4ef2-978a-dbc3cb0d4977/dyson_dc59_battery_reset.pdfIn PDF document text
    • http://zarugosa.epizy.com/zegikixadimazolatuwoziku.pdfIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_a555e2e71bf3411996ce6d457e0f9d45.pdf?index=trueIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_cb0b1b1cd9cf41f7aa226cb532d64f10.pdf?index=trueIn PDF document text
    • http://sigadoba.epizy.com/46283035769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02d0134-caa9-4a5a-a9cb-85463fb974f8/what_is_the_theme_of_deep_water.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_d42d6633cc804455bf948e32a0d72d79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b1e8a4-c31d-459c-9910-30cde10353df/how_to_get_fl_studio_for_free_on_mac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 4880 bytes
SHA-256: 1207a3347510be1c3e2f16ee550bdd14acd8d3205fc71058169c644db72f8d44
font_01_sfnt_off0001049b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 11324 bytes
SHA-256: 2fcfb66783d7dd7a9db68bd967fef36b82bdd2778d652c957f7ef77e72b1e177
font_02_sfnt_off00012ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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