Malicious PDF — malware analysis report

Static analysis result for SHA-256 009a80505723b394…

MALICIOUS

PDF

70.7 KB Created: 2021-09-27 13:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb42d9554af7fc4dc7634ddb7b051ca0 SHA-1: faaded5f3335c9d415df6fbf82fae30e9e441bc3 SHA-256: 009a80505723b394d2e320d2ab57757a09b18e7e996336d1f89c72fcb5818981
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely leading to malicious sites. Although no scripts were directly extracted, the nature of the PDF and the presence of many unknown URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://kayapalinakliyat.com/file/podizabor.pdf In PDF document text
    • https://www.nissan-utilitaires-melun.fr/ckfinder/userfiles/files/15180041418.pdfIn PDF document text
    • https://jdconstinc.com/ckfinder/userfiles/files/zaxolifutiwutorobet.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/xupanovom.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/xevudowovaxogumusuwo.pdfIn PDF document text
    • https://datajournonepal.org/files/dajirus.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/meguvudixal.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16308898651306651600.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/mexudezo.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/28875397629.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/limejoxowuposejifipixul.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/51668345653.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/futamotebepil.pdfIn PDF document text
    • https://ahha.az/userfiles/file/50887022173.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/bifedugiwawof.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-25/20210925190230735364.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/96442578696.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/88707830504.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/lizoxotivid.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/tegoduxegurejusogogufuk.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/30188513808.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/70380968191.pdfIn PDF document text
    • http://autodilygood.cz/files/file/vowapazodixiw.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/wokodasalukasofijiga.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/mutom.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/25044566947.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/jezinijeguxaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+fix+auto+rotation+problem+in+androidPDF 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_off0000b260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB260 16448 bytes
SHA-256: d7bc2e227a3e8922f4507bf483b2be89ef4bcbd191d6fcd9256f989809ef2169
font_01_sfnt_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 10908 bytes
SHA-256: 207fa0457728c9ba7eca256e1f91a3bdfda57f0e3cb421afdbf50988342a2882
font_02_sfnt_off0000f4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1