Malicious PDF — malware analysis report

Static analysis result for SHA-256 e135f0bfaff11caa…

MALICIOUS

PDF

79.6 KB Created: 2021-04-07 18:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d794ba26a9e849916bb6b22637ee798 SHA-1: e6a2d9193ba62736a9fc538d23a25e6e431387e2 SHA-256: e135f0bfaff11caa19aa00a37b3ff919b21ba46b2d5639db3d47f5f0d3a5a992
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, appears to be related to 'colorectal cancer risk factors', suggesting a phishing or social engineering lure. The presence of external URIs indicates an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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://jumiwimov.ru/award?keyword=colorectal+cancer+risk+factors+pdf
    • http://juvezupeteduzax.iblogger.org/comment_regrouper_plusieurs_en_un_seul_fichier.pdf
    • http://fapedivojo.22web.org/vutarifef.pdf
    • http://sajiwurejedetu.sportsontheweb.net/6316504367.pdf
    • http://kikawogax.iblogger.org/50126485319.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dazovosugev/core_animation_programming_guide.pdf
    • https://uploads.strikinglycdn.com/files/f5369953-9e0e-4587-a084-ec548c00e625/gakigesojo.pdf
    • https://s3.amazonaws.com/pirofopafu/33463435990.pdf
    • https://s3.amazonaws.com/panokojol/exclusive_patent_license_agreement_template.pdf
    • https://s3.amazonaws.com/vajefam/21897123315.pdf
    • https://s3.amazonaws.com/pugomonapoxuxe/89067536047.pdf
    • https://uploads.strikinglycdn.com/files/c33dba39-8c4a-4998-92d6-b1dacc831fb3/49557503893.pdf
    • https://s3.amazonaws.com/nonabafat/scientific_method_data_analysis_worksheet.pdf
    • http://tososite.onlinewebshop.net/welinaredaxivajedatomiti.pdf
    • https://uploads.strikinglycdn.com/files/e315a02f-0e08-4450-8fb3-f3d500cca3b0/mercury_and_me_jim_hutton_free_download.pdf
    • https://uploads.strikinglycdn.com/files/01a7b8c0-5a4e-4e15-89a4-dff714d208a5/maytag_bravos_dryer_parts_near_me.pdf
    • http://pijebikedil.epizy.com/tewuvagijixesuwipowujono.pdf
    • http://temekem.epizy.com/tumevifekuxu.pdf
    • https://s3.amazonaws.com/bogijexu/jawibilireze.pdf
    • https://uploads.strikinglycdn.com/files/d60f2f4f-9444-4e3b-8643-7568dcfbd9a6/96599918336.pdf
    • http://gozudivigel.epizy.com/48612995848.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_off0000ed63.bin
e4381ef81246e4428c8b80b461595c920f09c810817315e46bf89f6f910edb23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 5024 bytes
font_01_sfnt_off0000fe7e.bin
5431efe87c3c6c54de00fd3962a57517ca9e916ac2c237b100a0fc66bb774d74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10708 bytes
font_02_sfnt_off000122dd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 4324 bytes

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