Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e39720866d840c…

MALICIOUS

PDF

79.3 KB Created: 2021-07-13 16:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b5205744f62b025b927660d914559b2 SHA-1: be771fa90ead9a2b627ee5804eb4ee78772258f3 SHA-256: 88e39720866d840c9842d506e0f11c18819bc5755229d5e4445e8ddd23cf9f63
96 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 a phishing trojan. The ML classifier also flagged this PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9478

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://chcial.ru/square?utm_term=vocabulary+workshop+level+a+unit+13+choosing+the+right+word
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed4167dacdbe35d627e5a5/1626161511718/little_beaver_campground.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9508e19a9f87deb745997/1625903246513/vba_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e78383a4cbf0492a36c715/1625785219466/oncogene_is_responsible_for_answers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e95f6e566ded7d61ae6e1e/1625907054254/forest_ridge_townhomes.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94e402c5c2f6215ca654d/1625902656327/3_year_old_son.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed8c0343ec04194fd9958e/1626180611713/high_school_musical_the_musical_the_series_episode_1_full_episode_free.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca14bbc6eee4b05911641/1626120523214/33362988522.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecd60179af8a1ae19d0bb1/1626134017909/6523713800.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2bb.bin
22a316a0b294cd305c24b0a947d3a79624531b90b4515e8f0f5a2efce3396b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BB 16412 bytes
font_01_sfnt_off0000fd43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 16792 bytes
font_02_sfnt_off0001155a.bin
aa3372f431c62618ba918ed8f0255270afc8c44584d71619bc92d4a1d84620b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1155A 11584 bytes

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