Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e617c99ab65d0a…

MALICIOUS

PDF

71.0 KB Created: 2021-09-17 13:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: af723384cccb40e7d3d6582d23112b39 SHA-1: b3930d7797616046ec722a9b12aeb5ce34b6fc95 SHA-256: 75e617c99ab65d0a64bfc4ecfea1c667fb9aceac40a95520871b9ff4d9cb7dcc
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one specifically pointing to a download link for a game, suggesting a lure to download further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by identifying the PDF as part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=download+pes+2019+ppsspp+200mb PDF link annotation
    • http://www.jindatunnel.com/up_files/file/89384382216.pdfIn PDF document text
    • http://c-six.it/userfiles/files/34764476937.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/82894013614.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/banumalafimit.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/zaforozomakuraremi.pdfIn PDF document text
    • http://orenprom.com/img/account/file/19247019310.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/xasuwetaviwoje.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/topefow.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/80751629538.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/79882742155.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/wokezajupes.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/e0cadd299dd00abaa5c34f9ea450bca9/bumilopuladawigifikexises.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/livab.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/41059368352.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/27748597263.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/tamenimakavagudamab.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/22677465992.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/32525795731.pdfIn PDF document text
    • http://soc-in.com/data/media/files/31756010911.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/52683810224.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/29217318084.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/30809252925.pdfIn PDF document text
    • http://wych123.com/upload/files/doxofawumubuva.pdfIn PDF document text
    • https://mimpidia.com/contents/files/46614738978.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://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_off0000b439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB439 15932 bytes
SHA-256: 369d8b5641132d3d2cb590c7558cce8a6e6ea8d93bec517d58647b18e03ec229
font_01_sfnt_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 10952 bytes
SHA-256: 5b4f76a82e613bb59de8089e92fc6383cd572b16c2341598638f050993539c34
font_02_sfnt_off0000f66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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