Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa715cac2cee6fe…

MALICIOUS

PDF

85.0 KB Created: 2021-08-26 08:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8495b2cb9973a7175251e998f117ace4 SHA-1: 82ac4c16e25b820487661d692b1733bbc264de40 SHA-256: 5aa715cac2cee6fe8a633280e8f09ec0b247c2c96be1d89e32d0d66e393b5936
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links indicates a likely redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/1864c3744b3255779401823b680350ab/nivanuzijujo.pdf In PDF document text
    • http://thedreams.cz/files/dodirotejuxegizovu.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0d21d74e2---donezulijitiniverakom.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/9ffef1cdad48f605605647dda482e662/48721735930.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/limepivomekazakekira.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/zojepoto.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16100d8a05e32e---79188891282.pdfIn PDF document text
    • http://vuason.vn/upload/files/zetironojoxevaxolusik.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610bdf2a35235---sapokezekuxi.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/juseziviburonafabutax.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/679817c06e5ba461b24dd9184de1d905/27749101563.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/jg01aprkbb5okp3jumon7e2j6h/deruwajakupasoliruv.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/biwaboxew.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/linat.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073576b785ae---zuxuxuxaxakejunijefidet.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc056f73c3f---kijafexebuduwunija.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/gabiroxulunubege.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/dc3d32b635e7cd55a1a629dfc7a99efd/8629093502.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099862ba6bf9---75509759797.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b39402b91b8---sefoseziz.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/5053116110.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/49475780818.pdfIn PDF document text
    • http://ezibra.pl/upload//file/60598354264.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/8b1v00qo0j13mrepj8uppph9df/52758104060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=division+of+power+between+national+and+state+governments+is+calledPDF 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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 11256 bytes
SHA-256: df24cbe9028ff772b05c3858cb29583bc6b5da6452bc7a22a0d267a44e4ad281
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 18128 bytes
SHA-256: 2f670095bd0842f6ff219dbf2ff9ffb73814646170fb5bd97da05e5bce88f46a
font_02_sfnt_off00012ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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