Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2f513ed87d35ef…

MALICIOUS

PDF

92.5 KB Created: 2021-09-01 01:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8d515c3b57c2788dc88adec6e2a91c97 SHA-1: 1c04c7ccc81296adc2ac938cb813403de5562082 SHA-256: ae2f513ed87d35ef529bc6cf3ce02e3c3c3e5df47a2bfd57b6ab28259fffe817
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised websites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple PDF link farm heuristics further supports this assessment, classifying it as a potential phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://novo-foto.ru/ckfinder/userfiles/files/7304796582.pdf In PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021081414413873499.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/jomalalarawa.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755f8e17e64---29481088305.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8403b2f2e2e2ef582300c380ae01e74f/35770510837.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/bijupifamozi.pdfIn PDF document text
    • https://www.aeap.com.br/ckfinder/userfiles/files/52249015075.pdfIn PDF document text
    • https://cncunse.com/d/files/59878753739.pdfIn PDF document text
    • http://ossokahve.com/upload/file/jipepuralizupogebumipawol.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/89559bfc0c9e9525b513be5c68720137/sitazekesivamejedirimuro.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/bodifuwodebebilijos.pdfIn PDF document text
    • http://stonebreaker.at/30885280001.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/sodezirogedajab.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/1b0489ba070fcace4453c4f06a997a7b/bojixagubit.pdfIn PDF document text
    • http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/27110628240.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/j3vr84relg8vf2bb9bnf4nft2c/41424287767.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/48921813606.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/mm04het8ogtetcd7111ovkovj5/jelovudawimijifogije.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb49e3dcdb---nuvuliropovelagurajepoge.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/90198115538.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf90d107807---fapakuwefutokazaw.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/60733270768.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=xmovies8+inside+out+full+moviePDF 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_off00010831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 17276 bytes
SHA-256: 9619e6543c0f0c66d073ab9b023272266bea2a4827bf404eeacf2eec42b53b74
font_01_sfnt_off00013508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D1F 10636 bytes
SHA-256: 25eafd056d9dd79197a23a7ac18a6f239a8f07e056656899771b7ffd98c64a0f

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