Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9af417286a32d5f…

MALICIOUS

PDF

88.7 KB Created: 2021-09-15 16:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 860f64f047cea473812bd6d7719b845d SHA-1: ffdfacbc406854be6ad04aaab12051d73cbf24c2 SHA-256: e9af417286a32d5f1b55a1431485adce1248a709034e2226461f3a4a3a748e3a
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or domains associated with link farms. The ClamAV heuristic identifies it as a phishing trojan, suggesting the links are intended to lead users to malicious content or phishing pages. The presence of 'utm_term' parameters in some URLs indicates a potential tracking mechanism for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2664

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 https://garglob.ru/uplcv?utm_term=marvin+douglas+adams PDF link annotation
    • http://wsospice.org/uploads/userfiles/file/file/zubezunozimipukagamawix.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/47416003351.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/15929242671.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/52224422824.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/watanezivevewonoraramite.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16130dd0b2eb75---modozal.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/58299688305.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/loritefiratagebevojenumu.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/90903589801.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/naxukemogeviju.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/mutedaveduzibuxovitika.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/54745115090.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/0a7caad9283f5d9e4306385935f1f580/redumizesevoxo.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1613a021782787---98128799530.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/fefizufupanobotuve.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/99506423526.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/99737967646.pdfIn PDF document text
    • https://vestol.bg/files/file/vajukediniluwegetubopimon.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614173944746c---molisoxogufotu.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/39430701261.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c26eeca80c---vedanirasudovu.pdfIn PDF document text
    • https://tsegypt.com/file/64031762500.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf89846946---37624106980.pdfIn PDF document text
    • 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_off0001177b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F92 10520 bytes
SHA-256: dd7d74ba848ec11924d8cdaf380029c0f20a6f743227c4d8f5dd690f8ba5ebea

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