Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0191bb7f436570d…

MALICIOUS

PDF

87.2 KB Created: 2021-07-03 00:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61cbe16429efc0895435d57750260a33 SHA-1: d1f808cec3563d36751a8cbd86f6da46abd5031b SHA-256: f0191bb7f436570d222d2ef8270e2cd5f5fd3cbdcf006e8a3b1babe4a4d3e76f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, but the structure and URL analysis point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://media-get.ru/userfiles/files/vusodejosirarobulixamolo.pdf
    • http://younewstoday.com/task/userimages/file/jaxopavumi.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/uca7rup1542hj3qga22nha4se7/lofik.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/um0hteqbsn4en2isjd37dd48ms/61344124383.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a363622b924---89883759064.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/cldmelq9fud3ddulb6f5deiinl/fakamax.pdf
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/ratezeparaxegazizuragepo.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c55ec65dfd---40760236410.pdf
    • https://denizlihorozu.com/resimler/files/radedilupozuxiju.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be87753cd1f---vakudukoxefefapoxapegepof.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085744154292---gevijufodetolodag.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/02de0a8e72af967f4b9caac39ec2974f/65355477747.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcefda8c98---nagudusujovanijopa.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ef19a32b---fasusipojukomuxunan.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a7662e3cb---tepov.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d7edee176---biwanofovudefo.pdf
    • https://asthasupermarket.com/userfiles/file/71762784569.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6059be9ca---68210189696.pdf
    • https://okinawa4d.com/contents//files/27138044230.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/5347ec1ac69db96e5c1f6809c1703ce1/bixowuzixalogetiwor.pdf
    • https://greffedecheveux.center/upload/ckfinder/files/24185431956.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/7bc866edb656e3b99d0493b8ea0e95d1/57265675991.pdf
    • https://moto-trend.cz/public/files/fck/file/66997233750.pdf
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/a89f50a5a16374c5340f52eca6044798/gebitojawodawudutopufazo.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160797b49d47ec---mubenukekumipupakobonaxe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=without+a+doubt+marcia+clark+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff8.bin
1e35195474848ea0afce0cd2d16d038a2663afcb7be488a6638d6991df7db5a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 10808 bytes
font_01_sfnt_off0001089d.bin
01d711f385661899f203519f5045d7b6dfade1c7279aa3c2931aebff3f5dd642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 17696 bytes
font_02_sfnt_off00013734.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13734 16792 bytes

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