Malicious PDF — malware analysis report

Static analysis result for SHA-256 be264a1bbe990816…

MALICIOUS

PDF

69.4 KB Created: 2021-09-25 00:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 62bc535192f4b2bf5f11891b634ebfa7 SHA-1: 1f0b7d2dc02a97f3ac69efa0052013c721d1767d SHA-256: be264a1bbe990816a5d3d38721e5b5bc74d3734e95ad02e155b300e25fe72cf2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains a large number of embedded URLs, many of which point to disposable hosting or redirectors, indicating a phishing or malware distribution attempt. The presence of external URIs and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=coc+private+server+2020+apk+download PDF link annotation
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1613c86b712bad---fanufenujofajo.pdfIn PDF document text
    • http://packamate.com/userfiles/199809057.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/65090596051.pdfIn PDF document text
    • https://asiapharma.la/files/files/44889629280.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/felivapagun.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133582ba2fbe---28480392479.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/55562322308.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/kujufogalipikisoxa.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/48694011286.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/sovuxotifo.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/zikip.pdfIn PDF document text
    • https://sanmuabandoanhnghiep.org/images/content/files/76006119602.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/89004739212.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/nezutisinud.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/kaweminutugusow.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1632450408.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/99993613697.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/gonawata.pdfIn PDF document text
    • https://spyboarcams.com/files/bisezabavakojafiralev.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/12054663888.pdfIn PDF document text
    • http://alpinedelhi.com/userfiles/files/jexedunidumekafufuzelela.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mitito.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/tusimibomujizunemutenolo.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/rolubiroduguwowivorojirod.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/nuduginanipojarusirafuz.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_off0000b027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB027 11024 bytes
SHA-256: 40aba7d4e8b51b642b773292eb73e5c372b24e2b3037df33ab5e65ecdd54b6c3
font_01_sfnt_off0000ca03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA03 14496 bytes
SHA-256: d6c899ee622793706ebf77bfe1c329dcc9101787ce962529e9175ad35b860f00
font_02_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1