Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56637b1199cdc6b…

MALICIOUS

PDF

77.4 KB Created: 2021-03-19 20:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bbf8d77e11b3a4c67ddae2a44490b21 SHA-1: b9044a3cb038ef9b697d53ea7f36a05c3c40fd14 SHA-256: d56637b1199cdc6b30fd45ee9558ad10fbb9ac72c2063d28d6967907cef9520d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'Frank Zane workout', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=frank+zane+workout
    • https://cdn-cms.f-static.net/uploads/4380073/normal_604d29e342a04.pdf
    • https://cdn-cms.f-static.net/uploads/4469143/normal_5fd1a66048b3b.pdf
    • http://jofifuneku.medianewsonline.com/model_free_adaptive_control_theory_and_applications.pdf
    • https://cdn-cms.f-static.net/uploads/4444874/normal_6017520b6c68d.pdf
    • https://static.s123-cdn-static.com/uploads/4385636/normal_5fded36d21d47.pdf
    • http://zebiripu.mygamesonline.org/44489926717.pdf
    • http://mnogoturov.com/nedijexixuxerobijuxubizeow1kp.pdf
    • http://cethq.xyz/how_to_read_stock_charts_robinhoodxwb7p.pdf
    • http://rovanenafet.getenjoyment.net/61257634952.pdf
    • http://websporizle4.com/papokozitquljj.pdf
    • http://doxedisipi.scienceontheweb.net/seth_klarman_letter_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4443819/normal_5feeca7185d97.pdf
    • http://bioforcecolumbia.site/tiromezgkv2.pdf
    • https://cdn-cms.f-static.net/uploads/4467560/normal_5fe818345584f.pdf
    • https://static.s123-cdn-static.com/uploads/4424013/normal_5fe2a0051734f.pdf
    • https://cdn-cms.f-static.net/uploads/4499958/normal_604d08c98610d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wunojipu/getawubixexewaruxoxedi.pdf
    • https://s3.amazonaws.com/lunojol/43139968893.pdf
    • http://dozuxix.myartsonline.com/barcarolle_score.pdf
    • https://s3.amazonaws.com/rirusozo/xifolasamirurutotubaf.pdf
    • https://s3.amazonaws.com/sabegokek/pulufilenu.pdf
    • https://s3.amazonaws.com/legobegutulo/rawaje.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f1.bin
37442a049ba742b12acff111100267e72c8d4346c1d18cd6918006d4bb4c40d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 4464 bytes
font_01_sfnt_off0000f63d.bin
d1e9a9a0fb8f1bc4413a86b4666158044a8a0a1be2924f56a0d679c8f905a73f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 10536 bytes
font_02_sfnt_off00011a51.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 4324 bytes