Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fd9b36c96b0b58…

MALICIOUS

PDF

89.5 KB Created: 2021-08-26 15:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36710227b1a66cb2007de53222b55a09 SHA-1: d7bbaa8bf99c400f0ebb4490caf99f1bd4cd91ad SHA-256: d5fd9b36c96b0b5811fe72d2d6bc2f3fe284bd2a1e984bc2e364c47691037a12
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. The document body is unreadable, but the heuristic findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/xulamasobotabotawogi.pdf
    • http://zulassungsservice4you.de/bilder/file/kawokujib.pdf
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/99378621843.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/aefc13a24705630df73ed8d3f4a96177/rebomeloxetize.pdf
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210616_44B4FE6AF32342F0.pdf
    • http://banghetretunhien.com/media/ftp/file/25318626873.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611687b464f19---lilimepat.pdf
    • https://airbays.com/userfiles/file/61865830145.pdf
    • http://muzeumostrowiec.pl/obrazy/file/tebavejunazuvojovibirape.pdf
    • http://soflocops.net/clients/81266/File/gefawozasazal.pdf
    • https://evrenmentese.com/upload/ckfinder/files/jopuxaxulinile.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/74687378180.pdf
    • https://bhsbeacon.com/FCKeditor/file/35100337003.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073202d9987d---72667882102.pdf
    • http://secohthailand.com/file_media/file_image/file/44500171907.pdf
    • https://osiindia.org/ckfinder/userfiles/files/lorogizadutulaxav.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/uvr55n513sb1uhs8aa8b3j5pa6/buwoz.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/38070af8a8d575da88c88b498921b342/12558897754.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8a9ed0c14---vatajizurafonimorasikoga.pdf
    • http://cnc-soustruzeni.cz/files/file/xapugapoloziloleme.pdf
    • http://indyskischool.com/ckfinder/userfiles/files/lalujurujagufubuzi.pdf
    • http://frangarcia.eu/upload/file/pikazomewasubovo.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa6dfd0008---kavarironurirew.pdf
    • http://mhinflatable.com/upload/file/21168636414.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=nms+exotic+ship+seeds
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d0.bin
8d9c7b93f67fe3b8f9ce5a53d96c2e213d56d5287e534ad01e68678c51ef86e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 16088 bytes
font_01_sfnt_off0000f804.bin
f21cd8775cf194980c77f00e8828866496f18722c848304aa242b6c08bfc4015
pdf-font-stream PDF embedded font (sfnt) at offset 0xF804 17696 bytes
font_02_sfnt_off00012645.bin
56861b88a2c1131418d9dc80c6a95a1dc0154301f19a0e6312f268bfde1940d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12645 10448 bytes
font_03_sfnt_off00013e00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E00 16792 bytes