Malicious PDF — malware analysis report

Static analysis result for SHA-256 954e33e6ceb60d6e…

MALICIOUS

PDF

88.8 KB Created: 2021-08-03 15:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e64c317317883f3a3ae3039030464968 SHA-1: 54171b7bc22d9a6fafd6ddb2a266519c1e0c2ad8 SHA-256: 954e33e6ceb60d6e5778ae94e52868b02a7679b7f54d86f6367af6651aadecc0
124 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress upload directories or disposable hosting. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4807

Heuristics 5

  • 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
  • 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://clubesolbra.com/uploads/files/levopedodu.pdf
    • http://yangpupark.com/uploadfile/files/xozutilizub.pdf
    • http://barudan.hk/UploadFile/file/20210522104113703.pdf
    • http://naszymsladem.pl/upload/file/jipuwotovavusova.pdf
    • http://matchedtubes.de/userfiles/file/60168153239.pdf
    • https://108pizza.pl/uploads/userfiles/files/nolimijotaxo.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8de80e04a8---vuvufi.pdf
    • http://alphasigmaoverseas.com/userfiles/file/kifega.pdf
    • http://cableesmaltado.com/d/files/kunuzepidota.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41701774702.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b77739233---90095480086.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a9b9f260b---jogekiwilulupuritid.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a55b8e85a2---84908919470.pdf
    • http://eksan-ltd.com/userfiles/file/dazonoparosu.pdf
    • https://nazrabilisim.com/calisma2/files/uploads/dokuvuberumimadula.pdf
    • http://emannsltd.com/userfiles/9978875530.pdf
    • https://ochronaskory.pl/pliki_user/File/67274554965.pdf
    • http://aldo-ins.com/userfiles/file/tukopem.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/52772330367.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aad8304afd4---46548212260.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/d36e4f58e9022cb776d895fae93a0e82/kedobegaworiguwiwijonumip.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f8aaac226---8134480661.pdf
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/14578206693.pdf
    • https://ckmandarin.com/uploads/79272522766.pdf
    • https://magerp.org/upload/files/24434876200.pdf
    • http://flightshop.jp/images/blog//file/30494498909.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=aleister+crowley+tarot+deck+book
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f0b.bin
17baa3abb1962a5690aa984c8444a7025474ee67c41f9894ef6a1cdafdeb13e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0B 18132 bytes
font_01_sfnt_off00013ed9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED9 16792 bytes

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