Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fb9a499fe0c82d…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 05:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 909e49cff4190525f080afb1b0b1e720 SHA-1: 94d00dfcab7a0df229fae6311b29c4fc09143b81 SHA-256: 60fb9a499fe0c82d2f11c728bf0451fe41e450b90b95e0f2d5245bcd6b208e8f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The embedded URLs, despite some being marked benign, are part of a larger pattern of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 http://ourgans.org/userfiles/files/60033657051.pdf In PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb84c95915---20411378546.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/11667755599.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/gotinobofufiputal.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613376331c2aa---tunirejulagaje.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4ef107d86---54596778414.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/selufowoz.pdfIn PDF document text
    • https://anjingliar.com/contents//files/31088471875.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/senabupizixexepujevevefe.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/54029389841.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612416b90a787---40624200164.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/1588c7b97ec12b3e5abe98414ffbdc61/21025904713.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a779e0e0862---bosojeregizawariwonanodum.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5be774454449a2ed4cdb7b4bc05ef819/gezinarajeleboluje.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/59510688129.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/23127073374.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/79739677056.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/gedugevowi.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/37972465096.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/xuwurukugukepikitibelos.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081948e5cb11---sujip.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/taretojunesunizusugabotu.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/lisovikiz.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/lumom.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/e9b0881f079041f025a1d51371580503/defowawotezinijibepob.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd0de44426f---68592556661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=optimize+pdf+adobe+acrobat+dcPDF 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_off0000ea6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 10688 bytes
SHA-256: ba3ddd3d614aba8e096ef4389c431448719ffa8e5f8c82755f1d38f389bed23c
font_02_sfnt_off00011ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE4 18052 bytes
SHA-256: 1e4c32ea5f2c3502c5b1da4b13c78b580e098c0ac490c8271f3c9e9588108b5a

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