Malicious PDF — malware analysis report

Static analysis result for SHA-256 adad23a3cd01c6aa…

MALICIOUS

PDF

82.5 KB Created: 2021-10-11 14:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 93d497c3b28e36513f8a1e531a54caad SHA-1: 3557654dc7d458b003ced44e0eec2b3d40ad4e0a SHA-256: adad23a3cd01c6aa2ddcd5aea19cc8c6e704b6008f16b5fdbad4d6809b1483e0
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. The PDF contains numerous embedded URLs pointing to various domains, suggesting an attempt to direct users to potentially malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://billedbutikken.dk/articlefiles/file/50084888362.pdf In PDF document text
    • http://brenderup.ro/mm/file/9730677603.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/53609838646.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/59993085685.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/82854840228.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36132355921.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109290303271939.pdfIn PDF document text
    • http://deauville.ru/files/file/zidusovitebukusidexefugew.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/ee1df397e3ddb0bcd355648d8776c1c6/27035647959.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/negip.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/38474521812.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615054cc191fc---wizuvevipovi.pdfIn PDF document text
    • https://what.whatproperty.ng/ckfinder/userfiles/files/refirikuvatomujugotej.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/39342270881.pdfIn PDF document text
    • http://xycrusher.com/d/files/25346214872.pdfIn PDF document text
    • http://newshop.jp/archive/file/55277957532.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/kinokilukaxisufoxovu.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210902_F80C8F923B5B6D0C.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/suxogikuwogedutorateve.pdfIn PDF document text
    • http://imoroz.by/upload/file/22166586540.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/88503927661.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/23097977105.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/2I9n2o-U8HI/uplcv?utm_term=ginnie+spring+outdoorsPDF 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_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 10500 bytes
SHA-256: d69242ba362b6bd2ffaccb9ff6b2e2ddc84f87ce98d30ec14e443e561aa1bb1d
font_01_sfnt_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DC 19464 bytes
SHA-256: c73c8b7953a374ba5fb0c26740324bec15a969644b72c54ab19d17825833f135

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