Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f7913607819855…

MALICIOUS

PDF

64.4 KB Created: 2021-09-17 03:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 00f3e659ae1a06608b284cfa5e9dec24 SHA-1: f5199ffa18bfc4e3ac438a97343c41f5ea9dfcf1 SHA-256: 17f79136078198554e42e1652af046cf793b11c37d141cb1496a5691b368209f
124 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to disposable domains. One URL, http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2180acd6---witogupavl.pdf, is particularly suspicious as it is hosted on a potentially compromised site and appears to be part of a link farm. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7548

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2180acd6---witogupaxi.pdf In PDF document text
    • https://valergences.fr/userfiles/file/95511400928.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/dereraropiz.pdfIn PDF document text
    • http://rcmo.ru/upload/files/jutokoj.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/75226932848.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/momegemunanavosizirekulub.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/82918039127.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/89820254874.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/lizodafosa.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/75341648150.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/99741130265.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/77406609231.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/49838274667.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/2109031750065320541lx0ln.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613834420c2e7---83410715756.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/78087161366.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/46527557855.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/kinegaze.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/lodepiwevasazevira.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/xitatovifojunit.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/76137851373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=recover+deleted+contacts+from+android+phonePDF link annotation