Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff02e44ba4cdd5e4…

MALICIOUS

PDF

73.5 KB Created: 2021-08-20 11:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 06feff517e762d71df3df0c54497ffcb SHA-1: 3e2d958a7d2a78bd551be8d95a349eeec86784d5 SHA-256: ff02e44ba4cdd5e4af1bc3139f0be8fb5055ee82c5c8e5d6b37b0c37c41c2150
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://wastran.ru/uplcv?utm_term=4435bz+mosfet+datasheet+pdf PDF link annotation
    • https://kampusogrenciyurdu.com/file/85086099906.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/jepifunalafof.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/ravanipimepazodukibe.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16083f7aa65723---63844790397.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80aadd5ca7---74597008582.pdfIn PDF document text
    • http://carszana.com/image/upload/File/ponimuxelu.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/wutuxobakekodod.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/vuvadixajasaveboveju.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/kojowunuwitej.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/36912478772.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/57614538196.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/63544126881.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/29398146851.pdfIn PDF document text
    • https://asken.as/bilder/file/xugerunef.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/xagivukerejuxegemut.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/87977709234.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/q8uat0ki92p08uactfucl823em/73219068049.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/c071aecad6f1cce424af417f6d314ec7/tokegeguje.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46cb6dd89---dutazokajaditobelaliwazaj.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/076a40c09a7b33e5916578a4e6534774/karilodonezudaruditufevoz.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d3b416a8fe2129ddcf3d40ff82b3cf77/30919868925.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/kqriv1t0oadm3k7do4253tcbn3/gezirumatidubukeguvaru.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_off0000b9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D0 10908 bytes
SHA-256: 6f2d6fcc2113f03c9a0670c8f5bd58d95390755193f66ec379a2ac6d355af9c8
font_01_sfnt_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 17184 bytes
SHA-256: d75d475461444e17cc64b8f4c87332867620a777052e20cc68ee75e84b28c45e
font_02_sfnt_off0000ff74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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