Malicious PDF — malware analysis report

Static analysis result for SHA-256 8365181ec6bb5ab3…

MALICIOUS

PDF

101.6 KB Created: 2021-07-12 23:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 36498eeb213a04077cc81199846b79e1 SHA-1: 9e622a2c938493396a9078235bea3d63705e9a81 SHA-256: 8365181ec6bb5ab33be29b523f7aaeafa65e439e71efd0b3ff0ac4bd03a91191
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the URLs and the heuristic firings suggest the PDF is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://drafthe.ru/uplcv?utm_term=female+goats+for+sale PDF link annotation
    • http://lindseyderence.com/userfiles/files/52354452455.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160848d7dee304---pimofinonobijabadejar.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/58897761944.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f72ad2df9f---boxaz.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/zusoteruwezemeguronavofe.pdfIn PDF document text
    • https://hssanesteban.cl/files/19651767526.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/tugutenob.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56a7823f65---51106392894.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754f61c2db9---89898318466.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/99658353116.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/92291592211.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a17a6d256b---76333996573.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/93109721992.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075f2063737e---45138760.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/zokusojerojowemijoxekuxi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796fa69299f---fevivibakafifizupi.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/59343882983.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/savezubevuzi.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/87389307968.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/vabureponomafeso.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c3d9cd01---tixowaruxejuz.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/ziduvowozowobotas.pdfIn PDF document text
    • 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_off0001295e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295E 10336 bytes
SHA-256: 4ad256f5bd6642b71de5d5ab5a81267a91c5e3f52695a4a5c4db613813470823
font_01_sfnt_off000140bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BF 18360 bytes
SHA-256: fc4536f2cb45dc2998a74bc3af60198f14bc68aef089e49693c18a1fb1bc5a10
font_02_sfnt_off0001715e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1715E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.