Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c22e5894b2b3670…

MALICIOUS

PDF

84.4 KB Created: 2021-08-15 10:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f4b2032d36dc8879c9a5d3d7a18a31fe SHA-1: 3392948b082c0bb11d1d185f2f8c9867af9045c3 SHA-256: 6c22e5894b2b3670f229ea551e2c5bf86ed3f5f7fa0a795d650e8b576eedec45
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites hosting other PDF files. This behavior is indicative of a link farm used to distribute malicious content or facilitate phishing campaigns. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • 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 http://spreewaldatelier.de/img/editor/file/dosurubilekupil.pdf In PDF document text
    • https://tims.ro/ckfinder/userfiles/files/birozowonozul.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/cf9fde56a616a153c918d78f299c161a/94856084800.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3724b3d80---movagixufipugewode.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/1813657828.pdfIn PDF document text
    • http://wmhsclassof1977.com/clients/34196/File/78363996781.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/cf6d52d1423e8de5fb6f9e540cd13f87/dagilojumifivetorub.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160892873ba1da---46210024494.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/70246365980.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/ec06a27197b29ceb214e10949a253629/mukadevogiwe.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/bad0a6959b2db8b980d9b4c4392549fe/60664255036.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b418397c6b2---pulutarutebajuv.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/79157181866.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b4ec1b56e---kopor.pdfIn PDF document text
    • https://ludbaegitim.com/calisma2/files/uploads/98374670545.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/79356503036.pdfIn PDF document text
    • https://binhvi.com/upload/files/nafigenefupiwatimeduzu.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/0ar2kk6fat4enp267ue2hni667/78752421967.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c037d61a---kaneruveluvafuzodel.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/99915053902.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/84776653030.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ubnehdpoknpo6556ua01ajbk68/purupitisezagosegamimuw.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/40814426396.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/7c2e60393b6fd97ac4974abf57e5b290/mupapubowuxo.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/15036534712.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=house+flipper+ps4+gameplay+deutschPDF 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_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 11244 bytes
SHA-256: b46bc40485b708d5c6849396ca163a3d9bc34eb9d9fed668ae741999fce0c635
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 17900 bytes
SHA-256: 1940e5812fba190966d3fbe2650cffe62dd3afae568c6439b833513813f55c3f
font_02_sfnt_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.