Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ab49ffcedf06d6…

MALICIOUS

PDF

70.8 KB Created: 2021-05-15 12:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f7fec4bc82a90509fa4b2207b3ef605 SHA-1: 216d27c034a3eaced9bb749f8ea664ef653a0fe0 SHA-256: a5ab49ffcedf06d63fb97088fa5f529e04d2c13fcbb19084324ba20f785141b6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to academic leave letters, likely to trick users into downloading a payload from the provided URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=leave+letter+format+for+college+students+pdf
    • http://www.allatpatikapecs.hu/images/file/nobomin.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/bobusilexe.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/7a898aa0bbc65a4bdba55168099bb39a/xowisoridumuji.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/259ea63173a8d4fb6c3e26329318a423/kedemopelaved.pdf
    • http://alphasigmaoverseas.com/userfiles/file/25120613986.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/699bf05d7ce2797b625b165b04f0453f/32371361016.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607bce8f80571---64225984116.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16081794071cfd---tatozamipuvuwutomorosa.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5b243eaf2---kufok.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609079a1d6f3a---47887186601.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094215148b89---75883821766.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ufn1q15nv0f6tl7paaqmip6b83/kamapotu.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798e27c04dd---fagirukovulamumiv.pdf
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/6287d20bdb576351f11bab356e2d6b17/91027341486.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca8769608---wezinavebanotegipopodun.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/qtrouorq9lo76q88c3oa85mvle/tiwigozigupokonisoxu.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_off0000da05.bin
1d89a070553ec3d4da6e2cdc1d6b84c755380a6477be1a63e70bcc8217b65eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 5476 bytes
font_01_sfnt_off0000ec9b.bin
cc12bbce4b2d72ef85723a82c54b8c065bd62aa72b04b7fe1857b3612d62a7d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 9812 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.