Malicious PDF — malware analysis report

Static analysis result for SHA-256 67492e78742e3cbb…

MALICIOUS

PDF

86.4 KB Created: 2021-07-09 11:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7db28c4d5106977667d44f4c0b7396b4 SHA-1: 89f1d4cfcbf8e52cdaeb1802df3987bdac27b12d SHA-256: 67492e78742e3cbb72e31ef4f2a80304d167c0e1465c53fa3842eb0fb3115f11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites, a common technique for hosting malicious or phishing content. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users into clicking links that lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c0f0b1728---tozazewapuw.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1e326f885---mexusasanugevovaz.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075f59be7fbc---kevowulibabokada.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7e71a0b24---11817291227.pdf
    • https://nestaerospace.com/uploads/file/28764496766.pdf
    • https://unibel.pl/pliki/upload/file/xafevenuvag.pdf
    • http://sanruou.com/app/webroot/uploads/files/84356270674.pdf
    • https://tedvandergulik.nl/userimages/file/kezadefu.pdf
    • https://bnbcostaverde.it/userfiles/file/68912192723.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/h577mgclsu7lt8nkt0b34lqs1d/fofegaxoxajaw.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/c15639c63a4b8857c2dad4e28882960e/55103281899.pdf
    • http://polyalpan.hu/_user/file/dabomosixegoloku.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b767bd0de---24670680874.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/g8v3t0t99n5qv4gnvqqeoi7l2t/10002623847.pdf
    • http://ceomit.com/fckupload/file/xetum.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1a9e5d64---89110162875.pdf
    • http://piotrkowska77.pl/zdjeciafile/70937304692.pdf
    • http://seanmore.com/userData/board/file/zuregotejop.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/28p2ump9f3c28l43c23fj3ajig/tedatevefepami.pdf
    • https://samsungvrvklima.com/upload/ckfinder/files/wanoxajolisovused.pdf
    • https://gbagencement.fr/uploads/file/temimajapiwifize.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4be162cec---fenaridedudubuxuk.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983495acb4e---defijisemawafoju.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db0f88c71c---89064413880.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9619827d6---30420373398.pdf
    • https://louvre.lv/res/wysiwyg/file/21647482149.pdf
    • http://www.sudaff.com/pics/file/gutiradigunajuxaxukodula.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=rubric+for+report+writing
    • 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_off0000f040.bin
f06a42f109f605c82b081020bd4a4ed4caba0bfcfbe0f5919c04692ce96992c4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF040 10652 bytes
font_01_sfnt_off0001089f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 16792 bytes
font_02_sfnt_off000120b1.bin
83f531ec7567f1505c1f6eb4865eaf82fb8c2434af9e69e3badac58650277f77
pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 16956 bytes