Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d95134b3f7071d…

MALICIOUS

PDF

72.0 KB Created: 2021-10-11 00:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f75140948c52d397d8aca91ac1aee0e2 SHA-1: 79aebdaa03d143b44af633780c8565cd1b4aad81 SHA-256: f7d95134b3f7071d07222010b18751addd9abb04d2b326051ddba0e22224e323
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF is a link farm hosted on compromised WordPress sites, pointing to various unknown URLs. These findings suggest the document is designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161442dba44535---pozokatirizuruwimoxupagok.pdf In PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/hfssh48i0h224uolk7j3mlubm6/nemupixetozili.pdfIn PDF document text
    • http://seatraveltx.com/uploads/files/sokimasawisamozezu.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/wetefizuwix.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20211010200932.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/navojowovasa.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/29031838628.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132283fe7f8a---reravuzunipexura.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/6c1ac1d12bd9b46ad23e7bc341f5d090/vuxawufaburofapoxikos.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/74044276523.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161590d4dae648---gisabewekenikip.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/doxitomo.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/52148950540.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/68227872765.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/woxudowesowadove.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/sawufusiweb.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/47798110849.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a87c4025e3---11336614502.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/71734a5af47930830d922c854d6a67a4/25287086723.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615130b1ad802---jipoz.pdfIn PDF document text
    • http://3234.us/data/attachment/file/mavikugagamajidajirinaro.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/71404515430.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/97771772554.pdfIn PDF document text
    • https://laser123.com/geektic/files/punar.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///bajadisuratofar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=being+there+for+me+quotesPDF 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_off0000bae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 15540 bytes
SHA-256: db82643f86a626c2fbaade3e48599d978b3edd989ad5fe5a2c3128e08594fa54
font_02_sfnt_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 10752 bytes
SHA-256: 32b028183b6e0da1e1d2c84f882cc4f56cb13ca5b537d93a26fbf81ae812d322