Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4403310116bdb1…

MALICIOUS

PDF

78.4 KB Created: 2021-07-21 02:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: def2f3f5a064143c0d49fa6a58c32a19 SHA-1: 153259a32ba8cb27e92c5ee94c4a4d50258924e3 SHA-256: 0d4403310116bdb15882cc696aa1ddbb4d5b6a7aed2a976b0d8be0d452b1eeb9
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 high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/~3/0YvHz_IItD0/square?utm_term=fraction+addition+problems+with+answers
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed2daff2de0a6ebf307ab9/1626156463919/energy_and_its_importance.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e898aec1e0ce526f757b84/1625856174789/hmrc_pay_your_self_assessment.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2880629712869f05e376a/1626507270533/wifisufufazagozik.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8886cf3a1f037b371aeaa/1625852013076/another_word_for_procession.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f71d4eeb9af61b36d2879d/1626807630304/drawing_sketch_new.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed2e540124a666ff413eaa/1626156628873/vikusofekus.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0e2bbd1fa142bceac8a10/1626399419444/jitegodorupurigajuwa.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f6a43cf8b2bb71005c74b7/1626776636363/77691533239.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2fb88cba7b71501e23c0d/1626536840710/44783156909.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f5600e3a33e4096df3ed02/1626693647418/another_word_for_deception.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec92f0b3b63f0898f33867/1626116848999/solving_rational_inequalities_examples.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7ab9dba333063f175d056/1625795485216/synthetic_division_calculator.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_off0000cfb6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 16792 bytes
font_01_sfnt_off0000e7c8.bin
7ffa7112a79b565b0499fb381ce5f080a88a7c7caa95545c1031d6b1254884a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C8 16764 bytes
font_02_sfnt_off000113bc.bin
ca85f1244ae5ea8a446b2616bdab4a5236d4c4b9f3775800df0a513f39543c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113BC 10980 bytes

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