Malicious PDF — malware analysis report

Static analysis result for SHA-256 953e0be5acf1148b…

MALICIOUS

PDF

84.8 KB Created: 2021-09-17 21:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00d133319e3ccbf7ec239dc12f708374 SHA-1: b826760d97fa7721020e21e6fe925c148e8c876d SHA-256: 953e0be5acf1148b7bc923b8f5df7c8eaa51611fa461538e471f213d938e9ab1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic firings and numerous external URLs suggest the primary purpose is to redirect the user to potentially malicious websites, likely for phishing or to download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=android+game+project+report PDF link annotation
    • http://aceonlinementors.com/userfiles/file/10648176446.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/sibamuxonijutenajikabo.pdfIn PDF document text
    • https://kermanrooz.com/img/files/59315130936.pdfIn PDF document text
    • http://svarovani-tig.cz/userfiles/file/61253328032.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/rijutopuletipakufabizaxil.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/778112193.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/38126246456.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/sigaxodixe.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/87728891909.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/xigakawidof.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/galibediropidezelif.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/kudez.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/26992356971.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/69720127471.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/dajanawituk.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/nadibejav.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/75820696162.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vobomidokaka.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/vefulunokonifir.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/57276810908.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/36467014504.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/depamisanikevi.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/13679618133.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/34990970497.pdfIn PDF document text
    • 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_off0000e7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AD 17472 bytes
SHA-256: af3eb925f26e2970104a846047bc833eb4ac275ae7eec500723916c15253059f
font_01_sfnt_off000114d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEE 10756 bytes
SHA-256: 3964d6c71e7159375b521f6c4b11eeefed6b2d0c61b7e6735d530493ae7bf6a7

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