Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dbbe9e54b7cab9…

MALICIOUS

PDF

90.1 KB Created: 2021-06-29 02:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b011386d290cecb8829bff7035905017 SHA-1: 1d8bc18f088d2f7616360893b85190d8c164444e SHA-256: 45dbbe9e54b7cab92924cc2f568d4ae153a489f1c4d5c7a9d9dd197391b6524d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or phishing pages. The presence of multiple external URIs and the classification as a 'link farm' suggest the primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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://crewmak.ru/uplcv?utm_term=invent+your+own+games+with+python+4th+edition+pdf PDF link annotation
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5eacf85a67---pineweveluwen.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b0ba6b333---76784064826.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9c0f6113a48f98f9aafdd34edd33666a/45685315181.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/8pf937vqas38smtf0eqrtnbkdp/vibixinaxukuvubopo.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fae861f56---36602738277.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/zuwegimedigolobupikego.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/fudurarurozanewaki.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075359bd6757---vewoxo.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/c140b6973adf38d5dbe983bc656e6cc3/ripededowefadujukejareg.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-11/20210611231309522631.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/fululusifurus.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58f42d98e8---48724133699.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/c581353e2c9b6966e4446c5d0002db63/97788925603.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/nebazibepanewadotodabig.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/euroo9pcpi9s0m4h28dth5aq9u/75638119252.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c2fdccd9---63128962920.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a878e7c9539---bugamupagarovaxodudawat.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/baf4ffd97a7bd05a887580c050c3b70a/295314185.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608825e2497d6---82472226512.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/rmatdvauhqphg01570j15sdcj3/molawomo.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021052100275499.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/21869884515.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46af4e484c---30775794482.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/ibutui4vp0hu3o45gjbgdd7q10/mejorinepijami.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160871c45e1bf1---87129605937.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/a25bb04e1c5fe79f36a0e3d71215ce11/70891406550.pdfIn PDF document text
    • 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_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 17292 bytes
SHA-256: 8e0abab0c5ce50db3527032b34935b183b18631ae5dbd6c495e8f2ffbc699b29
font_01_sfnt_off00012806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001401d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1401D 11296 bytes
SHA-256: bd216afa66fb273cca8018e754943db6e85d5136f34b9a87af93b0b86dd2b729

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