Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9197954bf0062cf…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 07:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 53d0c71e5920171c0632e00368c755b9 SHA-1: b9cfa5150da66d832568363eee1acb3a595ac38b SHA-256: f9197954bf0062cfcc9c946208f12d323f6c99ba3905abf2bc91f00861940537
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains. This structure is indicative of a phishing or malware distribution campaign, where users are lured to click on links that lead to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5466

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 http://szjglaw.com/uploadfile/file/2021090323304573499.pdf In PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/44732304712.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/82306346598.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/zibupekusolofukivijudoj.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613132b569863---30799268014.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/82065877744.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/wolasosexap.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/fetijifonowigutopikotifub.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a865e1a60---86294654993.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/rafelavajejet.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fc5e26dff---4088884395.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b910a7c4e---67232833168.pdfIn PDF document text
    • https://brod-plovdiv.com/images/28560679722.pdfIn PDF document text
    • http://malerbetrieb-malanders.de/Webseite/pics/fotos/1/file/22163620576.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/faxetaxokuga.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/vurexokinos.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/18508356637.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/1pqib5bjr3jtsh0ra3hav511dp/309675465.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/61396608514.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/10554287923.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/22508214413.pdfIn PDF document text
    • https://bdata.vn/upload/files/xupedilozegakadusiwugosoz.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/42823143522.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/32571880355.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/35813755776.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/88037123197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=super+mario+world+ending+theme+piano+sheet+musicPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11144 20400 bytes
SHA-256: bc79a973d9ed3247847194afe86d5f608a8a2b844b3c1ffddf1ccd31199bb0bd