Malicious PDF — malware analysis report

Static analysis result for SHA-256 e849a09ad70113f3…

MALICIOUS

PDF

83.5 KB Created: 2021-07-09 15:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0f8de2262b0ef0c8de368977072381ab SHA-1: 9bff04f5a3be9fba100776a90d7be9b24956e7c8 SHA-256: e849a09ad70113f3f62e2d58b743ad31567ccaddf1e3df234095dfc80793f801
124 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing pages or download further malware. The file's structure as a link farm on potentially disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4045

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aaacdb8550f---98682350391.pdf In PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/fo6o5ocl9p6tpfsb4hle6q8a97/rawuredefomowutukusiza.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/18114069620.pdfIn PDF document text
    • http://bociany.sk/media/file/nelurulaxoxik.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fab35d619---77655823186.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1627b212fd---xigidife.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a87c51b062c---tosariguralijoviwanegir.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/12980057658.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b996a7aaec300b866fc22fa622d17bf0/53363418674.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/48578747013.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac94b55d5dd---lubobumilupevogifozuxan.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ede6cb044f---72384023175.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/wikotarin.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863455d917b---sepal.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/28e00d7f94dbe389b0d3cd34ad8f9073/kigetabizuburumik.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160877227a9d3b---83832707730.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ad208185b---fafivejaj.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/vitefetifemed.pdfIn PDF document text
    • https://led7.ru/file/824447689.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/tumaperedesopanusakakuv.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/54920656146.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16091742c72f24---wasirakipejugimatowixo.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/govoponisip.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608485411a5dc---53560848496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=boom+times+crossword+cluePDF link annotation
    • 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_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 10504 bytes
SHA-256: b44f0d46d761b3daf018de7a02ca46dd557418f004ecb9272ea0643d586ffaa4
font_01_sfnt_off000107ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AB 18812 bytes
SHA-256: 7a8d9a62b1dc84d14a7dd9e9f8560405a5ff6b08ee58ee47e8e0e53bcbf98f06
font_02_sfnt_off00013889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1