Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b457ac6d155ff9…

MALICIOUS

PDF

76.4 KB Created: 2021-05-16 04:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c48c3086ee99494993bacd08fac346e8 SHA-1: ea854ed663ab2a5edb539e6f0e33e7befb4cbd84 SHA-256: 21b457ac6d155ff9fe6c9995112ae0a06ef465551a8c1ed6d52f0a304c18752e
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to suspicious domains, and the ClamAV detection indicates it is a phishing trojan. The ML classifier also flagged it with high confidence. The document's content, though heavily obfuscated, appears to be a lure related to 'Marley eternit fibre cement slates fixing guide', aiming to trick users into visiting malicious links.

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://nomylo.ru/uplcv?utm_term=marley+eternit+fibre+cement+slates+fixing+guide
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071dda222d47---xuxeropamediw.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/37d5c8276fa4fafa0961afa7f4bc696c/sakizikesojiv.pdf
    • http://aldo-ins.com/userfiles/file/20522095309.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/ccef852cee1b866101672c208004136e/vivuzesevekokupu.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2fb1ece3b---zilukefakexomovurulupebe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0aaca3de0---82664277096.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/d2a8b132786cd8bbbb803efe1285b76c/vibejovomolo.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086205c4e594---3782413837.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e7a29384---45647143610.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c845d5561f0c08d0d7d01bb576ecf3f8/polug.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d8e5360e4---falevevobuzegibufemer.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16084ecb5c092e---kimolofizo.pdf
    • https://alakharia.com/public_html/userfiles/file/70707207602.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713c790b10f---31271653352.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/c766d12485aee9dc50d08abd76c98a9c/88874282233.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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_off0000decc.bin
0bfa9d2f43ab5e65613b4778aa0b728487b48fb4bd8da0524b93ccf5fed018ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDECC 5428 bytes
font_01_sfnt_off0000f130.bin
ed473a063fc8caaca506854068bdffdf3f18fc6ef80d1cb29434463123b5ebb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 10824 bytes
font_02_sfnt_off0001162d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1162D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.