Malicious PDF — malware analysis report

Static analysis result for SHA-256 07188a90f763d429…

MALICIOUS

PDF

70.8 KB Created: 2021-09-05 20:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: afbbbbb58eb5fad040d3ab28135d53bc SHA-1: 08323d928b792b28d96e987bd6ada8857966362d SHA-256: 07188a90f763d4297334bf6d15c9f1077eba6a37db834df21a0a70e40dfd80ed
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to external sites via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a062f575729---jomagakizotak.pdf In PDF document text
    • http://lidata.eu/files/fufoxog.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/k9646uim3efqdpkr5v29ior53b/65128458700.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115d041739c8---89044615067.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f43d804d18---setisafuwumomezu.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/sopabijelobe.pdfIn PDF document text
    • http://djpress.pl/Image/files/zukijijefiz.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3ad676112---49913676681.pdfIn PDF document text
    • https://vieiras.pt/imagensprodutos/file/bezikitulomufidamupowana.pdfIn PDF document text
    • http://come2menorca.com/images/file/koxulazutigizevi.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///31345298802.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/41753103449.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/37641100608.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160740ba2f2aa7---zododeli.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/safalitujaguvowawibonak.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ca057b5472f0f27f2c095d4a2ebdebb7/46614837183.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/ave7g1i3l1vfog7q8dtkjnio3c/nanesilewedun.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/54088760087.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2u60ro8vlt6pdjacdkprnd9rv3/15025870013.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160824dd705c8d---dawovoxizi.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/60024786556.pdfIn PDF document text
    • http://barksdalereunions.com/clients/869108/File/tefore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=radiography+testing+procedure+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_off0000b46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46F 15572 bytes
SHA-256: bfb059e4688c6bc7ad9bc03e812ddbc43c65686cbbf1cbcdd9d4755d5fda6475
font_01_sfnt_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 11112 bytes
SHA-256: 29be7707cfd4b4d9f89671bddec61a753deafa95d1335b46803c220c35312542

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