Malicious PDF — malware analysis report

Static analysis result for SHA-256 a471832e8704b74d…

MALICIOUS

PDF

75.9 KB Created: 2021-09-20 18:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: de8a85261b345074c22d9238dd971be9 SHA-1: eb59a2638be9a80ad05e072ffb7b703faa6f4be8 SHA-256: a471832e8704b74d08d7486da3346ff09c231ab00f87e6b2497d88cf4dc714ba
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters suggests a phishing or SEO-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ketchas.ru/uplcv?utm_term=snaptube+download+app PDF link annotation
    • http://dakmoto.cz/obrazky/file/89226712751.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/dumafikutudu.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/varobavoritibolexota.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/98736595150.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/jesapigudufa.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/59427410053.pdfIn PDF document text
    • http://penzion.sarmo.cz/Images/file/44521775955.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/fixojowabizu.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/bodelukabuvesotewib.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fe02abfad---6962975909.pdfIn PDF document text
    • https://huanghecables.com/d/files/62172318982.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210919031148.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d3b334bed0f20a9112c05d5e53e3154/soxuge.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b24b76eab6d3cef4aaeb4c6da51e48d0/mebasotukidolobuwure.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e961478c8a---jozasugosejaxoxenote.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/dedateseribemezudifepalem.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/31408746030.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/25264702589.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/36934318457.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136fd74192b4---nebub.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/jixesimem.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/fiderofuvudukikulitasu.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/javutotibofe.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/23267977668.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/mukejebejuxojunulavar.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/80265852333.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_off0000c688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC688 10428 bytes
SHA-256: 16750e32f835ade089733e325cee871e5646982279230e75a4fc708e2f4655f6
font_01_sfnt_off0000de29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 17172 bytes
SHA-256: ff4d919ff19ba1a05cf3dc8ba49289e3273b5722b999b4ab3f14973a74a9f9cb

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