Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c00f39083ff4be…

MALICIOUS

PDF

188.2 KB Created: 2021-06-06 13:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee546e9326e3d2f28864d7b100a7fa5f SHA-1: 62e645d20d845c1c34589d9203df385be8e266e8 SHA-256: 12c00f39083ff4be0364d7f6fca9c9b3f18bf937b71e3ff285f2fa6965d5e603
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to search results or informational content, aiming to redirect the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://crysiq.ru/wb?keyword=the%20quran%20is%20written%20in
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5fedc262a196a.pdf
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5fd18a49092f1.pdf
    • https://cdn-cms.f-static.net/uploads/4447437/normal_606385bbdc9a6.pdf
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5fde70ee7b539.pdf
    • https://xugofuli.weebly.com/uploads/1/3/1/0/131070332/a23f21.pdf
    • https://cdn-cms.f-static.net/uploads/4393035/normal_60266155289af.pdf
    • https://static.s123-cdn-static-d.com/uploads/4411944/normal_60aff5b0da346.pdf
    • https://zinebogexorebo.weebly.com/uploads/1/3/1/4/131437984/japituto_pokuf_makitozifus_jesakude.pdf
    • https://tatazopizen.weebly.com/uploads/1/3/1/1/131163492/0f469794529ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0c6501ee-f078-4028-989e-0ebc1b3707eb/gegiz.pdf
    • http://nubuzefi.pbworks.com/w/file/fetch/144643956/best_android_emulator_pokemon_go.pdf
    • http://togiwuvoze.pbworks.com/f/24852887001.pdf
    • http://zevatirupura.pbworks.com/f/how_to_recognize_active_and_passive_voice.pdf
    • https://uploads.strikinglycdn.com/files/307c549b-6412-47e5-bcd5-ba008dddf7d0/chi_gong_breathing_exercises.pdf
    • http://jifosez.pbworks.com/f/86286813480.pdf
    • http://pugaxigodaka.pbworks.com/f/zafapofobaludopaf.pdf
    • http://tosuvop.pbworks.com/w/file/fetch/144475146/29196599709.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0002a305.bin
867456bd65a821d0a584f7363e8bf33bf80fb6403a8953d453391bc2cebeac82		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A305 26032 bytes
font_00_sfnt_off00026045.bin
aab9b5f4bf1332f88b6072b3d5c352b119716beb00f28368d93c14586ef27568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26045 4908 bytes
font_01_sfnt_off00027102.bin
c3a906cc34b9a0831926ae877437b29ad177c3fbe6f7c39197a73c31e6b0f420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27102 16628 bytes
font_03_sfnt_off0002d2c6.bin
3db917f0dc72ce8a747450d080ef465f209434acf492d86f1c4cb5def58d2f37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2C6 6356 bytes

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