Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0d5db80fb300ea…

MALICIOUS

PDF

78.1 KB Created: 2021-07-08 08:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aa931a63f77c93d08bee1c657384c59d SHA-1: 269517bb8a49f90ad309f0277962a326aba6a460 SHA-256: eb0d5db80fb300ea5ceb114202fe11276e78ae67fa7dd52aba2be7465ddebc53
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised WordPress sites or disposable domains. The presence of numerous links and the use of compromised CMS upload storage indicate an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4580

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://alrukn.co/userfiles/files/96429474424.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095295f8164f---12674196219.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0e70253d175097ed5b23e4783dd9fbc0/26903062784.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/56820198196.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/gagifi.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb85a7d3b---54989540825.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/babatew.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/61579812292.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a419a75a2---xamimapasumu.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2c298f43bfff8545c06aeb7bfe07a638/82772212846.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/92955536284.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/16978129619.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9577826a0---botojuz.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/28a9cf112d6e29242a0c5f9622d2e928/10423522770.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/05c348cb027702a922bbfe7ae139ef8e/31502067561.pdfIn PDF document text
    • http://maihome.hu/admin1/file/70787841522.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021060402014029.pdfIn PDF document text
    • http://dearbornshs70reunion.com/clients/c/c6/c6cacd1d9512a3effe7244eb89d69e0e/File/molitewepewezap.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/72e3057587df539d570867e89c8fb5a1/peropuxekoj.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630763c58c---gomalugixobixanazaso.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/gapusumaxufuze.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951a5992f0a---30420723643.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608263158cb10---91972077709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=a+philosopher+giving+a+lecture+at+the+orreryPDF 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_off0000edb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CC 10912 bytes
SHA-256: 743fc72a6ce2bd1f18dd12bd316aa9dd175b9b28b8fc60790540859bcb49b954