Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f71805da85785f9…

MALICIOUS

PDF

71.4 KB Created: 2021-05-30 22:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e2bb67cd8298df2ef268061a60493d0 SHA-1: 7a3220e6d2bfaf553e0cc39d188399c9d74e7aa1 SHA-256: 0f71805da85785f9fbd49888f0589ad79ae0240b10820af03658d9cab5a233dd
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The embedded URLs suggest the document is part of a lure to download further malicious content, likely other PDFs. No scripts were extracted, but the presence of multiple external URLs points to a common phishing or malware delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://archism.ru/uplcv?utm_term=simple+compound+and+complex+sentences+worksheets+pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080598f2f8e1---zuwerubim.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfa279a37d---65685764405.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850588cd5ea---mapitod.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/c450d16d7aa0eca5f5d781e42fafe079/1063771373.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085deaf483ab.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac90b4331af---52839183424.pdf
    • http://assistance.uz/images/shared/file/lowosotobekip.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c337b50300---limekedamusedetitevunox.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afd5a83b1aa---33573701022.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160909755058f1---97023592590.pdf
    • http://amphorabeautyclub.com/campannas/file/vowavuteterizesizaxufuji.pdf
    • http://absolutelyneon.com/userfiles/file/90202716301.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ba2dhcucg5on08a0o9s4baqugh/46770573802.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_off0000d7b6.bin
9681dd7f7e8506f9841215df6e31a9b8b1199aadac0486dfc306c69a721d8357
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 5720 bytes
font_01_sfnt_off0000eb1d.bin
d181f4fc6f08df5350332014414fb185a827422474c70bdd827c549acdc46dec
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 10680 bytes