Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10cb2c542afcab4…

MALICIOUS

PDF

71.9 KB Created: 2021-03-11 17:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: afc26c76035ef9e9ae2cb7cb5d6523cf SHA-1: 9ace5739cccff34dd1730618dac9e760ae25f408 SHA-256: b10cb2c542afcab4f229d2fbe3ef6c556d75a8ce8e5b690040c955f66b2bd9ed
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a deceptive message, 'Please find the attached daily report', intended to trick the user into clicking a malicious link. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary IOC is the external URI pointing to 'bologen.ru', which is likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=please+find+the+attached+daily+report PDF link annotation
    • https://pefobasor.weebly.com/uploads/1/3/4/1/134131397/c9958fb0372b16f.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/word_365_formatting_issues.pdfIn PDF document text
    • http://xizadewakali.iblogger.org/gazetted_officer_form_for_pan.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/browning_auto_5_shotgun_disassembly.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/costco_vitamix_black_friday_2019.pdfIn PDF document text
    • https://jujowaganul.weebly.com/uploads/1/3/0/8/130874338/f8147b70cce.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/a_monster_calls_book.pdfIn PDF document text
    • https://moganuvutixeku.weebly.com/uploads/1/3/1/1/131163890/2583407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/78241579672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f43d6ce-49f1-4c15-b334-d769a7dcdf78/college_algebra_math_solver.pdfIn PDF document text
    • http://semowomeso.onlinewebshop.net/mokujuzofabinajaz.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/abbyy_free_trial.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/87013603433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f890dda0-6881-455d-9cad-177c29ad3f79/fasotodegoterijatiguma.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/is_the_story_of_catch_me_if_you_can_true.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/zugus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed93b0a8-7880-4521-8faf-9aae1bf71e09/93665972704.pdfIn PDF document text
    • http://webukoxaxox.rf.gd/business_plan_sample_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 5348 bytes
SHA-256: 0db11481f3188a0c899191f1bf2f0bab9d92abc8ff32c065f8cad5e0b22056ff
font_01_sfnt_off0000edf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 10748 bytes
SHA-256: 5059e9c013163b76d11e22967c00776db6b1025cfb5d340e6b8658e138303e2c

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