Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11275ffd8d3c5b6…

MALICIOUS

PDF

85.3 KB Created: 2021-06-26 03:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 28958ac40d2a6d7adaba64ad88720bc0 SHA-1: f01eb1d65c220793e73764c31f9af445b0cb7c5e SHA-256: b11275ffd8d3c5b6724b9a730ce19898c0bb4461c72f1eaeb6cb5732c5e12c78
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The PDF contains an embedded URL pointing to an external resource, likely intended to deliver a secondary payload or conduct phishing. No scripts were extracted, but the presence of embedded URLs and the nature of the detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=coinage+words+list
    • https://summit-christian-academy.org/scauserfiles/files/doxivoposifatududug.pdf
    • http://rhodeislandalpha.com/clients/56223/File/kibonurud.pdf
    • https://hotel-la-licorne.fr/userfiles/file/lonatulaf.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/0d2bcf6f014533da5bcf7528df10255a/57748846841.pdf
    • http://mmdplus.com/userfiles/files/20210605_014735.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1f5949de---pobapovi.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/330e9784521b44b8623e85c029d43e2f/35371165373.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f3a0edaf7---73863995922.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072a2dc7175e---javebexejumolovedef.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/94525862354.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160885738d67c2---12856021585.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/35586509724.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ieoh34dglkk5b99r8sv3eq1h4k/zozakozokatoluvutijus.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/q0ffq6jb5ftu11mciqagjul6r6/kigezumogoradirakoxijiwu.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/15fe5c7383949c59f13db455d2be0fdf/29483511586.pdf
    • http://backupcenters.com/userfiles/file/tibasofolojurazekidilu.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/f4q7p9p9l6r812j13o18uj084d/gorobiroxosaxirifebatipuv.pdf
    • https://healthmatters.me/userfiles/file/sulakuzogupamisisoge.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803be1f02c2---90221815983.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc7340242---lolutifixofedabe.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609f340457a14---16743548071.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091c38c9c0f2---95745142502.pdf
    • https://angkagenap.com/contents//files/lenozesetezaxuxowaj.pdf
    • http://dancedynamicsla.com/clients/38740/File/wolefegarena.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8af.bin
9cef3c2d115ebbe87f27c94ac53ee17f4df9d52403afaa09e2f1f0e1b03d95bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 18840 bytes
font_01_sfnt_off00011918.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 16792 bytes
font_02_sfnt_off0001312f.bin
19600c3af6feb89b20cda00795b74cee6239fc0310be9e1649c12b143933598c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1312F 10540 bytes

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