Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e177fe2685cce5…

MALICIOUS

PDF

72.6 KB Created: 2021-09-21 12:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c760ddf8aac3a4c5cf5569ce41194f8b SHA-1: a368f66fecc1cb03b0b6874b414764ae8fd188c2 SHA-256: 05e177fe2685cce54306d8b1aca27445d24ddc645f15b4247e9bda3d39c95174
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is designed as a link farm, likely to distribute or redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://ficfart.org/userfiles/file/66661477856.pdf In PDF document text
    • http://dientrotiendathc.com/media/ftp/file/17626865941.pdfIn PDF document text
    • https://ewt.cz/res/file/najovurikuz.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/64273167293.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/gelajuzevusokunijimiluka.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/53763707884.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/28357672751.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/55425814862.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/33219819150.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29271573944.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/lusutebowulizaderoruxa.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/47475351252.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/2051108984.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210910085402.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/damurulusomer.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/sebupopurokopoval.pdfIn PDF document text
    • https://grnca.org/img/files/files/93954031130.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/motajidopalokugaxezukigit.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/dejobopanim.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/zatabotixezuresu.pdfIn PDF document text
    • http://gewald.ru/content/Files/70178778301.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/ximivige.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/560645dbb9ca8649a4cf70023150247b/xisemafupivadogej.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/99304481577.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/ziruzimozejovugopalejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+crack+android+phone+password+without+losing+dataPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD194 15928 bytes
SHA-256: 1be27483a6eb51a610afbcc8c1b9b31fe281595123e1e76bd19ba60bdb101585
font_02_sfnt_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 11064 bytes
SHA-256: 5bac8c6b60e8b4eb552efc7126694716625ff26838d061d4d77dec2d783d4632