Malicious PDF — malware analysis report

Static analysis result for SHA-256 0323711b7db6d903…

MALICIOUS

PDF

95.2 KB Created: 2021-09-08 18:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 85e2675c8246740058d0855a7c73f3e2 SHA-1: 18e507edba13f76dbe23cb243ec6bcc2d3a79d6b SHA-256: 0323711b7db6d9031e181ed552d30a1a1945c94426928a8941eb288d3eee05fa
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 0.9965

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://youkuvpn.com/upload/files/pixiburipidu.pdf In PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/zavum.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/61644187951.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/45910814872.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/41578101729.pdfIn PDF document text
    • https://kokomanis.com/contents/files/42107567178.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/fipisolafa.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/tatovapufaxu.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/kulugavogifajawitarobe.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/devedepitawutobod.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/98748280580.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/nujepofitiwifunir.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/85373787278.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/23067439863.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/sobunatedipexanoruze.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/23077881336.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/81718790025.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/kanizew.pdfIn PDF document text
    • https://onecre.com/images/content/files/sebagoz.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/robelorekedamaxuli.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/54804984618.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/xofisirojuvinepovitegef.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/dumitoxuwak.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/81219253258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=aleister+crowley+777+pdf+downloadPDF 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

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_off000109cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DE 19716 bytes
SHA-256: c1a7f8c59bd5fdd0f05a76150ec6cfdc6f3df2265fba5e1ded35e22233c571a4
font_02_sfnt_off000155c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C2 10844 bytes
SHA-256: 669aaf2ec7ea38b5742ba7432ff8c762c0c5b7f1a4623803ed51603487923521

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