Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dfd87ae291ea00…

MALICIOUS

PDF

77.6 KB Created: 2021-06-26 05:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 72c6c6e5efc0b9babcf0aece11b9d930 SHA-1: 39a817afe56cbd2b028d6d56cb9c38e2b5b9b6fb SHA-256: 22dfd87ae291ea006b4732b2c1197a606479a08c0b0ee1c8c2fd884a16dbfecd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7400

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://mid-europe-ex.com/images/blog//file/19003169551.pdf In PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/ed2f2f8e81a12fa73541522702e2d603/xifumos.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/52485442696.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/vifawinakosopu.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/39032038465.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/galusapowaviwasivuwuxine.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/42451048759.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5a4bd115---50423619810.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/wigilegu.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d9a387ad3fe8b46a71ddb0b8fc8b977d/74655636481.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/81675002704.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d69957acc1---josabulagowopolo.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/91914881484.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/pimagiwawut.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/81902039048.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b6270857c3a---37681574596.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1d5b46304---10013290131.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/c8d21da04fd3324036e20caa52fd998c/fikereb.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba76c0f07a6---54076278463.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/46b5b592311c946d882f18ce49d0d9d1/27376331080.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/91adfa140b1a501e55341bcf4280c139/liwujorasaguka.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8b2da60b---gifugerobinapodozom.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db3455dfb9---ririnuxisivugidutolinopid.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfd90a88bb---31014270787.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/5727982e967e16db887c708917f7841c/fikafufubidimus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=focus+2+pearson+workbook+answersPDF 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_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001201e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201E 10648 bytes
SHA-256: 2b69aa45b61b53ca241a66bc909b520ff43d6e39e40566b711f25f55230fd9c4