Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d76cb703a9c946…

MALICIOUS

PDF

88.4 KB Created: 2021-07-19 05:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da26f3f09007c9859b1a3208b1917c24 SHA-1: 3cc0c5e1adbb6d49953b21192241aad450850bc5 SHA-256: 93d76cb703a9c946eb23863adb6e324e30b1d4764e33c88ec7d3890cd4c8283e
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 heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The embedded URLs and the PDF's structure suggest an attempt to manipulate search engine results or distribute further malware.

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://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0672422760fcfb19121f77f570421ecd/wufiganulevunudopav.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7215baa4ea75842299186ade535715e3/wenezabubufusosujivo.pdf
    • http://vzwsportenmuziek.com/content_docs/raxonuwulewulanejijedemad.pdf
    • http://tetobox-budapest.hu/uploads/files/jomumetomajeruno.pdf
    • https://corghialberti.it/file/45482235881.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6afv9trhjc5fpji9u4olppt1o/42425904477.pdf
    • http://chromowane.com/userfiles/file/sajaz.pdf
    • http://hataylezzeti.com/resimler/files/56162838999.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/b9mdqds1s83msk7nhkmqcujejh/55632613199.pdf
    • https://ecohort.biz/userfiles/files/32028981892.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073886e25ae3---lewusugubefefasen.pdf
    • http://aliglobshop.com/userfiles/file/kujiledugigedigumutonuj.pdf
    • http://omonetach.pl/foto/ilustracje/file/27557733170.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/vhadqjtkj2nib7iiarilmtk7e1/xojobenazu.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160763b671c8ad---tojuvunujoraluxawewone.pdf
    • http://ristoranteyuri2.com/userfiles/file/41613391404.pdf
    • http://tz5168.com/uploadfile/image/2021/05/24/file/20210524_235937_108.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abb9043e7c9---94003758183.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/d4f23938c68812f79196c1f82d51d17a/9992041312.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070a0eceeae5---55744565005.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160e815a50b785---26625276035.pdf
    • http://artkulinaria.pl/sites/default/files/file/jigovifi.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e94a63546fd---togelamimutelapomo.pdf
    • http://daedukgs.com/admin/fckeditor/data/file/20210702191927.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/8rlja4m1911jm1ul47vhpemqdr/88821143610.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608309fcda3da---26518924665.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=heavenly+court+in+the+bible
    • 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_off0000f887.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 16792 bytes
font_01_sfnt_off00011099.bin
4621003b9c6e7de3b01118e0e7b9ce581f95de98d656d5e11eeb5c03b936056d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 16780 bytes
font_02_sfnt_off00013c39.bin
2373d4fa00f0b29dfbbed860452e66aba260b4ef30038b23a104d45de9210a09
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C39 10568 bytes