Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdca09147865cece…

MALICIOUS

PDF

212.8 KB Created: 2021-09-18 14:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 218298b10fb20b2b456f4826afc8cbc2 SHA-1: 287ee928ee3460908a46d4ade8acb3f915dbfe1f SHA-256: bdca09147865cece334ebf995cc17666b8eb3e0d5fa663477ba8810443b08313
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many of which are unknown or potentially malicious, suggests a phishing or redirection attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://e-motorcycle.tw/upload/emotorcycle/files/53718461049.pdf In PDF document text
    • https://eko-briketes.lv/userfiles/files/fuzawowokemazuginagateg.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/6d6b6d90ca30bf28e9cf9c562d47af46/kigotoruzo.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/mufawibunebizumimetazad.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/23996296525.pdfIn PDF document text
    • https://tavio.ru/files/file/71744259601.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/071730079872.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/60962810030.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/93604731285.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/13827105887.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/wafeguxogamelodidewala.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/11457811629.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/37779737395.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/82859057790.pdfIn PDF document text
    • https://network-italia.com/file/52777014769.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140c955dac76---2308620244.pdfIn PDF document text
    • http://web5gstore.com/Files/files/mugekadotavebefegexatoj.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109110421357412.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/77311616817.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/mevewisuf.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/difeporogu.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/51808263190.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/39348964425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=android+tv+x86+oreoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002dec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEC8 10392 bytes
SHA-256: 621edcf06d968c05acb0b9867f75e05f8fe04c3171938cb7f252650e167ba2a4
font_01_sfnt_off0002f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F678 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00030e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E8A 20644 bytes
SHA-256: 95a9da8e701c9e68b63d9c01794f59224eb3841008253cd3b0c051ee274d07dc

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