Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2f4dc0bf287ba7…

MALICIOUS

PDF

70.7 KB Created: 2021-09-07 03:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b0e4bd588e1fde15ba944ba8ffd1a953 SHA-1: 2624d88dfdedab0af608a038c7ddc94d71c87999 SHA-256: 7f2f4dc0bf287ba77b89917f40d2582bdde7bb4459c98362a5b263bd2debdd51
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5794b937d---kutupovisomipan.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ri411sonjod8igaoe7j195knfs/dusewoketotenirotu.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/bukuresiwufidov.pdfIn PDF document text
    • http://sherylrobphotos.com/clients/56056/File/kubuvetegawen.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/984a573f1b4ba8bb933528e8a0d80881/78191143473.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/94578034096.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/moviripokoxebesen.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/tujefopowijosimi.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608083c5afa01---11630123482.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/45494440153.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/50977511418.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/5noofn7s83k93uk2iq640lrssh/31399332451.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/firalitogepedix.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b0e0367f5---37537067411.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/nfop36hocoo2hhd9udbce0qmk5/lixibojogod.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff723d82e5---sinomonuroso.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/77568762253.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b6d166967---25034507473.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/34682918038.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/61827359956.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0e22496d3---76368191245.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c3f240eeb---48557124940.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/84783859444.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/b340653c799a4de44a977bb948c624dc/lonud.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a8c1026f2447701d26d7b9336fe14374/kofunatelizixuvog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=ghatna+chakra+upsssc+vdo+book+pdfPDF 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_off0000b340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB340 15364 bytes
SHA-256: 65c16a21282b10ad4868c15ab0bcb01c00adc95f8da24256d23f1c037cbba344
font_01_sfnt_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF234 10884 bytes
SHA-256: e17d99b7192ecab71e952662764208798833285a03e89c8e5611f1441265563a