Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2706700f867aa2…

MALICIOUS

PDF

89.0 KB Created: 2021-08-06 23:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e85be96f8c74caef2599473c77d4f75e SHA-1: e08d0120aa4d425fcd7295ca866fd55a2faa30a9 SHA-256: 7f2706700f867aa22914b7b303e079296947a2af51123f62781435ecb057bc70
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076049acda4f---ponatumopure.pdf In PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/731f4fbee5341acd2abac0e085bf533d/lowuzugugafemijoloz.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/12652188953.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a1d2b8f6fe522e0abf0fc974087a819b/23841577479.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/75141497166.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/xolijuwe.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/aba6e83f9c77d5cd358909a0086be093/82814160714.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/15ca40ed7a4fb22e7aa8d8a95713819c/62988596837.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/wotaluniru.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929cf245b4b---28011253683.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2f46624ad---wajaniloxewifijiben.pdfIn PDF document text
    • http://nsureunion.com/clients/71556/File/81914153243.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/wokimap.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210801193341_yycegw.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42ad208f07---73439805886.pdfIn PDF document text
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/pokogitefivugupav.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/gebonoxoviwozamokurutoliv.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/161071db831b3d---luxupipusaxa.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ec7c84dbb---taruletudewasusidomo.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/8d09c398dda01c2dd95b3e45380a5503/kelepufoputanoto.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba88e9df926---gukofuregumoratotuz.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/zidutikevisisutifiluroj.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ne53go0j7012qk6ip4fko9d087/544132602.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=can+and+can%27t+for+ability+exercises+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_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 11036 bytes
SHA-256: 1571c891b1eebc448abfdf38eb2e9b4465f6bc261ef9a9077cf817fe8345da38
font_01_sfnt_off00010f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F33 17180 bytes
SHA-256: ad9f22afdf682e2d4b680e5c70e9ef132529f1e871683bb3f12a92e7af75a169
font_02_sfnt_off00013b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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