Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1966c4f2e55acf2…

MALICIOUS

PDF

83.5 KB Created: 2021-05-09 13:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f99bd66b5013f011a2b03b58a6375a6d SHA-1: 7c91c57f2f5b2981965f3c532f5e92eb1bd10038 SHA-256: e1966c4f2e55acf264b082ff9ca3e8d31756fcd537d38b2f31e3a17ffe1628a5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a suspicious URL, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=is+powerdirector+safe
    • http://niluwipewuxasa.medianewsonline.com/adding_and_subtracting_like_fractions_worksheets.pdf
    • https://cdn-cms.f-static.net/uploads/4456387/normal_6061fd0f3d1df.pdf
    • https://cdn-cms.f-static.net/uploads/4408719/normal_6025ff4acac19.pdf
    • http://eyebrowthreadingdallastx.com/troll_mount_vendor_bfabm9d9.pdf
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5ffd52d9012d8.pdf
    • http://jonotijero.medianewsonline.com/diode_rectifier_circuit.pdf
    • https://cdn-cms.f-static.net/uploads/4374838/normal_603165d71d344.pdf
    • http://legendnat.space/10477048014dgdro.pdf
    • http://nusezuretoti.scienceontheweb.net/99681852074.pdf
    • http://bupetud.xyz/pokemon_blaze_black_2_evolution_guidef76fp.pdf
    • https://static.s123-cdn-static.com/uploads/4384308/normal_5fc64f07604ef.pdf
    • http://urro-hu.com/3687453935727uy4.pdf
    • http://robugipunebib.mygamesonline.org/dynamic_stretching_for_golf.pdf
    • http://evgeniy-semenenko.ru/how_to_open_microsoft_visual_basic_for_applications_in_outlookwowu2.pdf
    • https://static.s123-cdn-static.com/uploads/4427287/normal_5ff2651b81200.pdf
    • https://cdn-cms.f-static.net/uploads/4502819/normal_5fe716327cf99.pdf
    • https://cdn-cms.f-static.net/uploads/4382201/normal_60552aab77135.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zedowep.atwebpages.com/tufesed.pdf
    • http://sudexixurijaxoz.atwebpages.com/behavioural_activation_schedule.pdf
    • http://wejufutaz.onlinewebshop.net/rurebotajid.pdf
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_9eb1f3db627c4b40b93f99a94d13aa15.pdf?index=true
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_ce4e1d34b146457c9209294ea9d6dde9.pdf?index=true
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_ad3050b7029c4107b0eb76dec2dc1546.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f791.bin
be2120fa6da61e3b360183ae8508d420bbeb927564c0738b8e244c2f5d0c1da7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 4328 bytes
font_01_sfnt_off000106d1.bin
28512e39b6776d4046a534f8b085e00fd649f43e1e23dff2f4500699974edad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106D1 5148 bytes
font_02_sfnt_off00011877.bin
e62e390d536be496480b58ff64cf849f4d48b483f576b95c633cb0aec84b8925		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11877 11920 bytes

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