Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d46927cb4e45b8…

MALICIOUS

PDF

75.9 KB Created: 2021-07-17 21:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7981bb503c23b2313c976b2754b1dacf SHA-1: 42071e566fce030cc210544a83c7ae9dc55980cb SHA-256: 20d46927cb4e45b8f8ab6eece4755b8df8af019c889875e59e41d5260ac1a396
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. It contains embedded URLs that likely lead to malicious content or further stages of an attack. The file's structure and heuristic firings strongly suggest it is designed to exploit vulnerabilities or trick users into executing malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/iCUEKX862tE/square?utm_term=examples+of+health+related+fitness+and+skill+related+fitness
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0201fb3de5a36b128319a/1626349599866/nawexirumomiwoxoson.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edf494172ba47bdac61ed9/1626207380984/the_parasympathetic_nervous_system_is_to_the_sympathetic_nervous_system_as.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eff46fb3de5a36b126280e/1626338415483/71602124066.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7ad77a1add4dee1ebc6a/1626110679420/i_will_be_there_the_jackson_5.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edba2977d6f70fe3a2ef67/1626192425745/safesabuvo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee2d6384a0477e84aa46b4/1626221924001/tunavakagefibekopofo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0ce425d5998001029fd8e/1626394178761/psiphon_pro_free_download_for_android.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_off0000c675.bin
6eab380dbb03a9b7f949040df251ab3599848e430f7fe63038510001fc143a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC675 16856 bytes
font_01_sfnt_off0000f1e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 16792 bytes
font_02_sfnt_off000109f8.bin
328f9b139bcfa74c6c71164d72af3673ac1a6cd111a898793846f9ddc21040b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109F8 10940 bytes

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