Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef52ba94bb2f692…

MALICIOUS

PDF

83.8 KB Created: 2021-03-20 03:37:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 187bb90c9ddf0e018bb7e4d25dd10764 SHA-1: d592980299dc6efad86ea88290eef75b884c2c00 SHA-256: fef52ba94bb2f692b46abd0b16a04e2d25054b1973e8d986f2cdbf12c5cbdc79
96 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, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to '3d goggles for ps4'. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=3d+goggles+for+ps4
    • https://cdn-cms.f-static.net/uploads/4420905/normal_6040391f659fe.pdf
    • https://cdn.sqhk.co/zirevazul/Mn5Mij2/mabifixazabebikojojopago.pdf
    • https://static.s123-cdn-static.com/uploads/4368746/normal_5fcbf28380c14.pdf
    • https://cdn-cms.f-static.net/uploads/4477138/normal_601424cd1e7e9.pdf
    • https://cdn.sqhk.co/jeporikate/aLiezxs/79474257414.pdf
    • https://static.s123-cdn-static.com/uploads/4368970/normal_5ffcf32f8b58c.pdf
    • https://cdn-cms.f-static.net/uploads/4446030/normal_60417f66a9bd4.pdf
    • https://cdn.sqhk.co/disumuneriva/gtQhghf/mutomukujilosuvabojetu.pdf
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ffce20af3a51.pdf
    • https://cdn-cms.f-static.net/uploads/4424405/normal_5fda8da41de3a.pdf
    • https://cdn-cms.f-static.net/uploads/4453901/normal_6036262e9e3bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_a73f9914635e449eb1e3fdf4ca4bfeb3.pdf?index=true
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_95de9fb5061a4b7d9076e791c9ed1b15.pdf?index=true
    • https://s3.amazonaws.com/gapivegek/tax_free_wealth_book_summary.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/75574992566.pdf
    • https://uploads.strikinglycdn.com/files/ed4f698a-25d5-4b88-90a3-205c875d070e/42905733445.pdf
    • https://s3.amazonaws.com/xumakomowi/how_to_use_x_core_sprinkler_system.pdf
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_3105ad8c309f462d9683784662fc971a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f7424937-15dc-4218-89be-ece6c46c84fa/wesugel.pdf
    • https://s3.amazonaws.com/kavalukato/94955267005.pdf
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_115e476f5a9f434ba3a7f1e4bbf56388.pdf?index=true
    • 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_off0001097c.bin
1a48c41e40930f2eabdc283e0445be97099e78743fb9da30d90c970cabc5a1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1097C 5156 bytes
font_01_sfnt_off00011b23.bin
295755e39e8b4d01d6301bc4801716db509d9219ab307aca9a98d3f94efce6c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B23 11076 bytes

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