Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0d7fa17bd77730…

MALICIOUS

PDF

102.5 KB Created: 2021-07-14 03:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a8d907b6d489bd50b050ddcc37aabade SHA-1: 83d1db7f1cffb5c50eb5a929a67848cb2ed2b5bc SHA-256: da0d7fa17bd777304002f353b77a0e4acf25520f2fa39b8badd7c1ff4f69f3a3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The presence of this external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content. No scripts were extracted, but the embedded URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2550

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://chcial.ru/square?utm_term=below+her+mouth+full+movie+123movies PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edc8cbba7c7f743c1ae9fa/1626196171625/53862406188.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94d873f195e1e4037afb9/1625902471425/organisational_culture_and_leadership_schein.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee2f081cf0e6777f2d6c0b/1626222344658/19298746082.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee0c388feeeb055d961bd5/1626213432341/99222364401.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8f4a2f492d21a0f69099d/1625879714580/s_chand_physics_class_9_book_download.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C97 16280 bytes
SHA-256: d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515
font_01_sfnt_off000122b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B4 18508 bytes
SHA-256: f20d7bc9e3296a3df316d6b182660db5310808dea3de8ce32975a828f09c41bb
font_02_sfnt_off00015332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15332 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B3F 1784 bytes
SHA-256: e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb
font_04_sfnt_off000173a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A5 10860 bytes
SHA-256: 00ac16a13f79ab55148ef2247ddaf557201c959076e8ed3c6e26df2b7c5f5141

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