Malicious PDF — malware analysis report

Static analysis result for SHA-256 81cca0960cd2d5ed…

MALICIOUS

PDF

78.7 KB Created: 2021-07-14 04:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b4e8ed114a1e36b44fb8456f3543554 SHA-1: 80376ea25c9b9a861046d6ccb5950e6dad2c27ee SHA-256: 81cca0960cd2d5ed8d1d5805a1598982152d7530ff4f65f910a4da386388ae3f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the presence of the malicious URL strongly suggests an attempt to redirect the user to a harmful site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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://cructi.ru/square?utm_term=cupric+sulphate+and+copper+sulphate
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda9ce5dd1eb1c2907da8c/1626188238333/india_and_its_neighbouring_countries_quiz_with_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7b13f89f8e700bf69167/1626110739662/practice_and_practice.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8335f4454ab0ddd8991f4/1625830239730/whos_able_to_get_the_vaccine.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e80b5057d2352c927e5e5d/1625819984845/xixibafaludelo.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91c92f107ff2467e8e207/1625889938873/guragatufikiva.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_off0000cfa6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 16792 bytes
font_01_sfnt_off0000e7bd.bin
cb9980e21e11651b7939fd98f72bbb015e8c2272a65e3b71b8b3f1a29ee10f31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BD 10740 bytes
font_02_sfnt_off0001005d.bin
e55e9adb713179cb2f343f95097e7f4f10cc4046aed2c2adaa491710a8fcdb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 17688 bytes

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