Malicious PDF — malware analysis report

Static analysis result for SHA-256 92854c1622a1785f…

MALICIOUS

PDF

98.5 KB Created: 2021-07-25 16:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c501bbe5b451c5b11b59caa1477abaed SHA-1: 8f70c29fbc7c001d9285c5580fb2e1f69a34c357 SHA-256: 92854c1622a1785f42c71b02e63515f679f629a1b1734a87f709d02347ad31bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support its malicious nature. The file's structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8088

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 http://bjbtrh.com/files/pic/file/14934841598.pdf In PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607287b503c75---dogisuvujitibevana.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/9sfv1qk82siraiiiojjskqjkb2/nofimomikiji.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/39926920185.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/97532895126.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/46428386704.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/toper.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/sapiwamis.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/9a4239df20eb33c744bfa6beff080554/sutag.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/gevafuwibejobot.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/uhstlgsi7rnisg048528n0qot7/warazibawotulujibegabowo.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/e31b7ec3b9db3b7acddb3421d7e55729/85994266379.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/dupapimodakivowod.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094a029a098c---22166573287.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/39217268877.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098bbc0dc5b1---40333208354.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/fe28a67cb26053eae6c5a10f84e8d544/mekowajiniguro.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9115d74cb---maxiwa.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210707_135409.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/98558920151.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/rumipebelazelexo.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/bkamfke79eaistl4slblbs20ne/suduporavibetire.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5054a4b0f---68388936313.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/kuligomigujuwimuniw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=manual+delonghi+portable+air+conditionerPDF 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_off00015f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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