Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ac22b01e759668…

MALICIOUS

PDF

74.9 KB Created: 2021-07-18 00:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be9a272d03b15baeb772748488408479 SHA-1: 1ecc7b958513be61552089f95fe346d3ddc37335 SHA-256: a4ac22b01e759668f96b861be6e78b0ee4c98bd73462318c67844e8f53e4132b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall indicators point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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/XMoLd4EPXkg/square?utm_term=all+walks+of+life+idiom+meaning
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1a7d952a9ae35ae7ce651/1626449881662/doctor_driving_mod_apk_android_1.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed361039532c3941be7418/1626158608690/wugodajozub.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1bf297fd050746e97ec43/1626455850045/introduction_of_accounting_class_11_notes.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee28affb3cc800db53f6a1/1626220719673/aws_cwi_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0e1b06186c431003f48bd/1626399152319/xubanosofezijuzi.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f34520deec5816202eb112/1626555680864/wagowini.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_off0000c21c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC21C 16792 bytes
font_01_sfnt_off0000da33.bin
c84381077f9078ca3bd2662085c77ef696338eef383b9b6ba718cf4c44b80c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA33 10660 bytes
font_02_sfnt_off0000f26a.bin
d19bfe9592841481078769e5ae89c17bf8cf3c192b42ea9cf05f3c4785bfe43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 16716 bytes

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