Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3e4dde08c465cb…

MALICIOUS

PDF

81.4 KB Created: 2021-09-08 21:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 7fe5b32239dccf2e18f26d0aaab2c058 SHA-1: 93b8cff6493aaefedf8f3475d31144333b7a49c3 SHA-256: 9f3e4dde08c465cb27f0ab846ad1165f2cb7877a845e4741af8f28b6cfb2e470
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://elfast.ru/userfiles/file/7460752068.pdf In PDF document text
    • http://architettoseneca.com/userfiles/files/67543810666.pdfIn PDF document text
    • http://www.dreamstoreonline.es/ckfinder/userfiles/files/girezufixu.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/55348742868.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/7169797968.pdfIn PDF document text
    • http://belv.ru/userfiles/file/kirez.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/47661277175.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/72119260384.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/tovogotukikal.pdfIn PDF document text
    • https://membermimpi.com/contents/files/sufavifinakinuki.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/33549666180.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/gurovexutufulugemekis.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/88512033804.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/69hhfqh03j9kp6i111dpsq05h6/16356629769.pdfIn PDF document text
    • http://lg-palette.com/upload/files/96764418333.pdfIn PDF document text
    • http://ativn.com/upload/file/6348517140.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210901220459_k522cp.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/etuzutatigopijivux.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/99402073569.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/67678490906.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/67131424791.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/lemifajajeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=free+word+to+pdf+converter+software+for+windows+xpPDF 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_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 17572 bytes
SHA-256: 84aa0ebe1b6cdae162c6c6bffae79a9cf9aedb284e95af8ace56215bb9621f45
font_01_sfnt_off0001065a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 10800 bytes
SHA-256: 78ce33209d25e1258ef44c3c853a9075680d1bd54912c28695cd530acbf1ece9

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