Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f0d90b0a77d65c…

MALICIOUS

PDF

44.6 KB Created: 2021-07-18 10:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eca9afc198d580b590733e4b3aba5007 SHA-1: 61cd40183822f3a30f11c89a928d33ba29f5bbb8 SHA-256: b8f0d90b0a77d65c10ef7d7dc376aad33672f83eb30dd327ad83e1040c3c1ab0
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for distributing malware or conducting phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. The document's structure as a link farm suggests it is designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://bhsbeacon.com/FCKeditor/file/bakigup.pdf In PDF document text
    • https://deitratech.com/userfiles/file/15568473382.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9cg4dsfjoo0gu3mbkedkrkm9kj/zololedaxunerotutixarusi.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/wuruzimileji.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e1b2004c70493ec4c62828de0281858d/vilapomeme.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/ef279f12452532f06901f6a07937599f/panarofu.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/74374925875.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4668ce80dd---20710809796.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/48280661016.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54bc21d80---28589047400.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f3b8a469953---lunukuvazuxelakavinilezo.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/4en2jkdpbn023kstm4kil7hh32/walitona.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/kewegoneratiganebuzitema.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/4402184622.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/77655701221.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/9638647325.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/2024095811.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f3b42e17695091f4681beb3d14930477/xobilevexiru.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/tvhvnaa61jp3e80018lvb2et8h/12161020034.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/6l0mlgbm2i8egna7aqgoh72bt5/21076744280.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/52003560910.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/zoparupemoxuze.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae11681e76---40548309600.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16080cff3119d2---10527034013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=adjectives+that+begin+with+a+to+describe+a+personPDF link annotation

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