Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d37d459e576a0a3…

MALICIOUS

PDF

72.3 KB Created: 2021-05-11 06:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3136e172a506a162b07a6783b2dc5590 SHA-1: 823e78d4d956272c5a185b1df6c0f9465456db9b SHA-256: 2d37d459e576a0a3cf8d9d5aca33980ccb767803f39148b1b20461d9cde13104
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic and numerous unknown-reputation URLs suggests this PDF is designed to trick users into downloading further malicious content, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allasclub.com/campannas/file/41914896568.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/e613bb33c71fcd9ab93b5ad4333a9122/monozerazevejov.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b1135565---85217670770.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd569c258---zapajapifisupexeraxosul.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084162b5937a---21576453860.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7474632da---38721338330.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/a60f75336df61e2ac563c3eb25405219/sokuw.pdf
    • http://dok-vo.ru/userfiles/file/fujesibenivi.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d69dcc5d77b15d4ce9a9eae84261e895/31169709688.pdf
    • https://tortugafilms.ca/adminfiles/file/joxexebaxoluvukixavomuku.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc00274887---39619502025.pdf
    • http://www.contectrade.hu/fckfiles/file/52907533948.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/ede39732a9718fadc106b5afb2cb6744/bizixufapidowopelatinej.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/565a8b627c7fcb06c9ed7bdf08218aae/79748793899.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082574aa8678---49579450742.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f1c0c46b---zorawaxewor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=energy+systems+engineering+book+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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfad.bin
4e8c9dadb6ea576b533d38a4e11a75fd113a9d05939f6996d89e68019d21c365		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAD 5172 bytes
font_01_sfnt_off0000e12f.bin
57049572b277fe846f0dd8387da795de24d84827ded9c3bf9b7ee9114395e297		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 10284 bytes
font_02_sfnt_off00010478.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 4324 bytes

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