Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7d9f54baff3f1b…

MALICIOUS

PDF

70.6 KB Created: 2021-05-10 16:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 794612dc306542c97295cfcc7021c79a SHA-1: 812d80a2cebf9891c919c7c343fb3aeca7d0b6da SHA-256: 1f7d9f54baff3f1bf5b3c40621cfcff9c265717f92ce3d2a7b0ce5a99ce8c524
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that, when clicked, likely leads to the download of a secondary malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'cricket score sheet blank', combined with a heuristic indicating a visual download button, pointing towards a phishing or social engineering attack.

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 https://queure.ru/uplcv?utm_term=cricket+score+sheet+blank
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/5ac26daa5ab23df9ea9935e8607a1116/pogusogir.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b5fd6299a6e7b3aaa7330809b40aa6c6/kofeni.pdf
    • https://liniagdanskzydowo.pl/files/pipekajilamel.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/2817242b9be98947d578e5b18c11a4c5/53731222164.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f93c342fb---48086875247.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/airolkj25glqd9lte48ngi8ho7/womuw.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45fcb8885---14511121731.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2fecfc79---boxubivabo.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c03ed31c3---berizadulejorutogawitutu.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086372e07ff9---63268391269.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/k3bvavd9krkod2iic868sj7foj/60285168565.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/hu3v7gtm5v5ae17k56ol91tqqi/557961572.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9a3c199266edb4a578c732238bb64575/7717938495.pdf
    • http://palyavalaszto.hu/teszt/upload/file/xuwodepenisidot.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/5n58vdt69m7j0nunrushlsv6j7/dipabeselazuvoluta.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/278ijr0spte93io98m3gaduue7/6640317800.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d868.bin
18b398576b152cf5da2af484ac08bbd1a0b5894a3f75475970a8455af0762afe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD868 4996 bytes
font_01_sfnt_off0000e95f.bin
29225836f11a3f356a68bf8776af1cbec8fdd94f341ade87f6a2a63fe0df49dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE95F 10520 bytes

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