Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc57b4143cb571e…

MALICIOUS

PDF

82.4 KB Created: 2021-03-17 22:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47adc64e445b82d635dff87226d1cea0 SHA-1: dbd2e848e9681e6a5bc1883c1071d07e51fbf156 SHA-256: cfc57b4143cb571e6ae86e77a7650f9be743f421e5bbc121f3be00b72b2005ff
104 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The presence of a 'download button' heuristic further suggests a malicious intent to trick the user into navigating to the external resource. No scripts were extracted, but the overall structure and heuristics indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=golfbuddy+wtx+smart+golf+gps+watch+review
    • https://static.s123-cdn-static.com/uploads/4491426/normal_5ff0f771172e0.pdf
    • https://cdn.sqhk.co/nizivatitogu/xDjficj/kezol.pdf
    • https://cdn-cms.f-static.net/uploads/4445868/normal_5fd68c9333dd4.pdf
    • http://nibakelenixezas.getenjoyment.net/wahl_clipper_guards_size_12.pdf
    • https://cdn-cms.f-static.net/uploads/4381541/normal_60308acb5df68.pdf
    • http://gekiwejal.scienceontheweb.net/63042009334.pdf
    • https://cdn.sqhk.co/nipigagavadu/ahiIias/asbestos_vinyl_sheet_flooring_uk.pdf
    • http://jedomagisuw.getenjoyment.net/are_oil_filled_space_heaters_energy_efficient.pdf
    • https://static.s123-cdn-static.com/uploads/4470981/normal_5febb13c22d31.pdf
    • https://cdn.sqhk.co/savujegu/4ehgsuv/buxegevozotibavas.pdf
    • https://cdn.sqhk.co/jidelugob/ieNK9Mk/15630749524.pdf
    • https://cdn.sqhk.co/kifuzopeko/4aWUurb/spinach_pasta_recipes_vegan.pdf
    • http://bewesel.22web.org/brawl_stars_apk_desenvolvedor_2019_atualizado.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_d4a28fa1a448410694cde349fafd0ed3.pdf?index=true
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_342db776e7fa4bb89581f6be76976cdb.pdf?index=true
    • http://nazonuretowu.epizy.com/psychology_articles_free.pdf
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_f4c3769571ec4ccda5779105b8b74247.pdf?index=true
    • http://guzumirofega.epizy.com/free_basic_facebook_app.pdf
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_350ef5fe84514036a8ec4d5546fd809e.pdf?index=true
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_ed54371471aa49a0b913ba41fa389e0b.pdf?index=true
    • http://jokubamobivavum.onlinewebshop.net/tibikatugebaw.pdf
    • http://marakolin.epizy.com/best_graphic_design_software_for_logos.pdf
    • http://tazododamir.rf.gd/kebobozufewuga.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_off0000ffb1.bin
6e9810310b151ed4806c426d64775c93f8e7ef57d732cdfffe2f8a92c7461625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB1 6064 bytes
font_01_sfnt_off00011449.bin
3ff71b1274b3a99424c0dae9b4d9c552f2c6fc4a1ab75995cc3e29f06a2d721c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 11640 bytes

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