Malicious PDF — malware analysis report

Static analysis result for SHA-256 7533d3595d9acecc…

MALICIOUS

PDF

77.5 KB Created: 2021-07-19 20:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cb40b59d39fe27588ad9f2e36dce03d SHA-1: cb0d70e435a10a7d258fb508f960cb604f8b46c2 SHA-256: 7533d3595d9aceccc3470d65b83988871368dab93d0b56fcc91560eab830d743
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains an embedded URI that likely leads to a malicious site, suggesting an attempt to trick the user into navigating to a compromised or fraudulent webpage. No scripts were extracted, but the presence of embedded URLs and the overall detection score point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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://feedproxy.google.com/~r/sq/ugae/~3/AG-UZpNbJGc/square?utm_term=minecraft+server+roguelike+adventures+and+dungeons
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edc1c7cb43530604a4fd89/1626194375942/what_gets_blood_out_of_a_mattress.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7907950202184f0f6981/1626110215519/class_8_odia_chapter_6_question_answer.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f44cab860d895b48313b65/1626623147196/tonitawomulom.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0fed16e3a8560b3d0c39f/1626406610121/the_nine_banded_armadillo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee62a06d75c50a5d464d72/1626235552263/how_to_write_letter_of_appeal_for_college.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_off0000ccd4.bin
9abfb5972754d30036a94c4c9d2c546552de22d2f4695c67535d95ab73e46d12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD4 16784 bytes
font_01_sfnt_off0000f886.bin
a0ef590bf3d0da049c428a4be388affe7aed41e773837be4bab46aa5974cc673		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 10900 bytes
font_02_sfnt_off000111bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BC 16792 bytes

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