Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdec526561028551…

MALICIOUS

PDF

108.2 KB Created: 2021-09-10 18:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: dcb91e974ad81f3a3f458034220ff6f4 SHA-1: cc59cccd7aa4346257d4cfbd3055a5a453e784df SHA-256: fdec52656102855101066778c78661921aef25d2c67484aee32e20c480c1ac70
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://doanhnghiepvietnam.org/img_duhoc/files/42686904234.pdf In PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef936c1e0f---16880469870.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/19171242416.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/fetorapesolovu.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/ramodoretagoxaladetem.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613894dfaa5cd---dabuketozemanivux.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/wedadova.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/towunefojigufodugeme.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/bugokifidolemedoga.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/kusakagemumo.pdfIn PDF document text
    • http://screen.by/images/file/kavowubat.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/dijojepafurefixano.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/64023437792.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/92086165387.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/kezabikegerigodul.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/suderekivirokare.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/43267577602.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/72223991097.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/zogofefokemanezikuv.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/10763843196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=final+fantasy+iii+advancePDF link annotation
    • https://lapdonline.org/file/fedakeji.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15481 10404 bytes
SHA-256: 4269460ffa176f93fc14a872309b8846bd935042b1e2d9e58dbd7ee97079e198
font_02_sfnt_off00016c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C31 21280 bytes
SHA-256: 8fa54f69a0c7c813f0aeb89de41b47abbe380bb6a03deccd2254b361ad49c34e

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