Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f90d5a2d6796be…

MALICIOUS

PDF

85.7 KB Created: 2021-09-13 11:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 270166025dcf29773e9fa60ea79b1cef SHA-1: cc2f735a064f08f779c363c74df6f5fe99870962 SHA-256: 69f90d5a2d6796be79ec3c26740f92efb6b2602838316a63e08c6972df72c4b2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://espritgt.com/userfiles/file/90122571514.pdf In PDF document text
    • http://devison-matras.ru/upload/file/608106773.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/33061578831.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/14231656442.pdfIn PDF document text
    • http://autovoda.ru/upload/files/mizuneduzevidateramaru.pdfIn PDF document text
    • https://tsolisp.com/files/file/nibogetozumikubelunefet.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/nozapemav.pdfIn PDF document text
    • http://sourceandsecure.com/uploads/userfiles/file/72920587057.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/muvuxeleb.pdfIn PDF document text
    • http://schokozentrale.de/idata/95266915199.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/93856364580.pdfIn PDF document text
    • https://rm-parketi.si/uploads/tutukixebiwavewaruto.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/wamepuxo.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/wawivop.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2bd6f1f979c21d02721ffed518fc4f6b/fevikotowig.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/venojazifulafududagaz.pdfIn PDF document text
    • http://brenderup.ro/mm/file/18621830982.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/56355024436.pdfIn PDF document text
    • http://linker-apps.com/files/99749015544.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b92f0e8c3d---supisifivigitapiko.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b71b47fb5---16743706768.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/jariwokotogat.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/kubukawibemuxudofogax.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210902_E73714A6506FCCA6.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/8507828378.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=connect+android+phone+to+tv+via+wifiPDF 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_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 17632 bytes
SHA-256: e286068b4c6a9e83c117ba19f486709f8fabcf0231957b536e896d04074ee254
font_01_sfnt_off00011835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11835 10684 bytes
SHA-256: 25451ca564241015765905e41c3bc1c17c36d6d7c1e352c8ab3106c00f990a65
font_02_sfnt_off000130ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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