Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b40d29824369aaf…

MALICIOUS

PDF

96.7 KB Created: 2021-06-30 11:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 02c2db60d1ceb2ae0da5281a9e575a5d SHA-1: 07db7c4f2ae90355b0cddb0de4c06736258f5279 SHA-256: 4b40d29824369aaf339ccd92aeb686c41f7b7868584c53e7c85daf2d2b9b82ba
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and embedded links suggest it is designed to lure users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0114

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=multilateral+in+a+sentence PDF link annotation
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/3de31bb6074504157149518ddf2e9f38/57190460720.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13b0dd153---padenuwinelakawebotuto.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be02b48eb0b---pofezabasuwoweligexiwutan.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/7794043996.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/turasevusagoximebe.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce28a8d29---tawibadi.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/bifisorowudazakigol.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210618_030718.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/89075612908.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fef98c268f---libukifaboxijarovofu.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/87626998587.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/27607814417.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/589fa33faa536b1ffe256235b173fb43/67400386960.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160718a3fd797b---naguzinuv.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/97237754696.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/146fe4d9fa95a77135713b9e5637cb28/bizumewe.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac92a818b38---rosameretafejubimezusi.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/t6j30llql3f5mts42jbclijlci/68160456314.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/40558201467.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/79093ba89c057e39e9202cefbfc8b5a2/nifukiwivifexizopawonigo.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d4d74ef9b---gafavaxajiriwabupijur.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dbce4792e---36926870453.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e9e3c78d7---nafilojokapuzuvolakukepu.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/6a68qd6mjmdl7p90cinudfpprf/13545623159.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb987054b7---xonezukidadubujixofo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f35f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF35F 28208 bytes
SHA-256: e158eb2158578ff53e7e967a32eb1cf81a4f303cbe517f9784386830d9996f6d
font_01_sfnt_off00012506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12506 16336 bytes
SHA-256: bdb7406ba94c1709354bce3fe2858175ede7d98f61a66d542ceeb652206ac6aa
font_02_sfnt_off00014ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001670b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1670B 10196 bytes
SHA-256: 39f0567e5df697e83e98c2430deae92131104499717b0ba50a96a24fb717d12a

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