Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ef1ee11dbf1b27…

MALICIOUS

PDF

74.8 KB Created: 2021-08-31 06:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9a916e5f16a22adcb8b6914f96f7f642 SHA-1: 272255ed0af4d708484dc1d14bcd12db967bb454 SHA-256: d9ef1ee11dbf1b27969f795d21af9f96dff55d05651ee9bcefc244a79977304f
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://sca-kc.net/scauserfiles/files/7962809080.pdf In PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/20dc360f18877ef9be782639bbad31e9/maxisagezotitorajov.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/78305471722.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/jogabewij.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a137d76cff0d05ef450b9c658e1d0d10/75350625516.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/48723979666.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/grc1vdk636d95kna1vvjulppjs/74868348831.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/kawudepa.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/87425f813a312a43ced97a4f8de34ac6/kasuboxapojulo.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607464ebc789e---natatovolisugipuruvoje.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/85964408662.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/xivabadenideza.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c750c9e9cd8---konekujoneterukedaki.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4v4tndvl8ufk81t069d8ktjehn/90400792831.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5f7de369b---46400547167.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/53139947313.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/cb54282130d392ce5f841b1344ae3a33/64042852344.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/57669500836.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/zipijuvebegadi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b095a0c1443---21022716950.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/20616988482.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/261229257088.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/fcce8a36142f40bb6407fe9b9c3c7b7f/24858120084.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/wafedekijinerazoxidas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=amy+rose+and+marioPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BE 10360 bytes
SHA-256: 6437bd184c25c209d14a398900bcd4eba29309205de8b6299e82fb0ea82ea2c3
font_02_sfnt_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 18736 bytes
SHA-256: 14a9b0759d999afe9165cedfe8fb2194a4f609ac8eaf7bb8ab23256737bd26d0

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