Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e633049cbf1581…

MALICIOUS

PDF

77.6 KB Created: 2021-09-22 23:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7c7d2eca8cde2a4cb4d24fff53d41f38 SHA-1: 067627132d2dad06af7998bcb4b4ca52b9924ffb SHA-256: 27e633049cbf1581b81297cc6f1bfb86c5b1bbb254a02dd51dafdf875ff2191d
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. ClamAV detected this file as a phishing trojan, indicating a malicious intent to lure users to potentially harmful destinations. The presence of multiple links on disposable or compromised hosting further supports the phishing and malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6a7153411---57114363611.pdf In PDF document text
    • https://vinniescustoms.com/userfiles/files/zusivijokepapupev.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5b98905bd---52104484055.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/98942983909.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141a83935b83---13303458661.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/vazuxufiw.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/fazuguxuzokuzatanabeb.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/vazezako.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/19099271722.pdfIn PDF document text
    • http://eros-arena.name/eros/userfiles/file/69857539262.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/vifuxemuvisotulisavufoban.pdfIn PDF document text
    • https://bawauang.com/contents/files/87987597202.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/gajurapalipapasegigani.pdfIn PDF document text
    • https://etadelloro.it/images/file/kibafukizabibozopo.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/32387961967.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/20408755623.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/lunutodepo.pdfIn PDF document text
    • https://at1apigroup3.com/contents/files/65004057022.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/jalipisinijamevajewegixa.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1630521281zozodilefezuleniso.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/11348139437.pdfIn PDF document text
    • http://attilacenter.org/userfiles/file/ladewititazasa.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/notizulakipomogekuzirel.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/30138127409.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/865f0737b6b71efbfab04ac9ecc4b3d3/regatuxuxixajotakutewu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=best+android+games+kostenlosPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 16752 bytes
SHA-256: 93a0513ee75a9d1b69f460627271ce0e6e6e21f0a4ded58d651f86d366be2a71

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