Malicious PDF — malware analysis report

Static analysis result for SHA-256 d764833f6d082c55…

MALICIOUS

PDF

66.5 KB Created: 2021-08-17 04:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e1ce84b8ac09af7261bd85759da13527 SHA-1: 59698183457332776d41560e94bdf7ef8067e138 SHA-256: d764833f6d082c5599edd664a7c3edef11fcd19ad94d86d3e38c48512a8fa8d7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to direct users to external content, likely for phishing or to download further malicious payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8521

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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0ca02cb89---46858244589.pdf In PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ab08f4g757643eo3vflt72v8p3/47963285096.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/60e2e3df601dc86c888b5086ae866b3d/1460708274.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/segalodojasi.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/zutimekoke.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/fubivukufixilevidobe.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/vig6k6od29uh9n479t92rfrv73/mozosisajesutofonisiru.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160744c3fdc5a4---9028466667.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074917c58583---tixarijilesazomodimuf.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4tpf6r01pr17b5l5nd94loks70/mavumezojolowules.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/efa8d2aba7b498693517f4445e10e5ca/bajovejamogif.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ad02f3c7e---59472806806.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/jevijiwidapubasujavi.pdfIn PDF document text
    • http://klinikoral.com/img/userfiles/files/13942400235.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/13478642032.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/guzovabow.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bdf99d43529---5007558376.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/s7o6u9ud2gjgm49jmlh0juofd3/1866720781.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/bavumeroladepok.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/retumajoxuji.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/fd92f5d11078676412f1fb4bd2b8c866/tozozaweresodaj.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/fafivumipefufisa.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210710_FFC2DDAA9774D07C.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=linking+words+for+essays+with+examples+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 11296 bytes
SHA-256: b6748578023c765205c0b2ef4879f90b673c0ce6360a52f422941bd542e49410

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