Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16f207e30052374…

MALICIOUS

PDF

72.3 KB Created: 2021-07-16 05:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09f08e814e83d60fcb8f4a680ce31416 SHA-1: dd65a8e04f52b90c478b210607485e511e367abc SHA-256: d16f207e30052374e5d0df404c6b88db7ba3925ee70a67e96a992e61b61fbddf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, 'https://queure.ru/square?utm_term=generous+man+meaning', was extracted, which is likely the primary indicator of compromise. No scripts were extracted, but the presence of an external URL suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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://queure.ru/square?utm_term=generous+man+meaning
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e85f96344da47feb0c7905/1625841559142/spinach_goat_cheese_ravioli.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7f4edf4d7c53d8b142f26/1625814253763/why_did_general_zaroff_stop_hunting_animals.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0cd2e311eab0d81a6fc3b/1626393902235/xejikogok.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92df9025aa46e30d33943/1625894393453/51104855353.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6d7f27fa864c7d149942/1626238336020/fidawidijewowiguluxipib.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0ae6083d5aa155e7def6f/1626386016884/8947240374.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94ad92f3c4128e18b996f/1625901785569/lord_of_the_flies_chapter_4_questions.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee4b621f51426150cdf999/1626229602502/95943899988.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_off0000bc44.bin
7049639cd5c7083af2e05c0c06bc32e20e45d59945e3efb4c764054bfa446baf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC44 16312 bytes
font_01_sfnt_off0000e5a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 16792 bytes
font_02_sfnt_off0000fdbe.bin
13fd195a641b6779c8c92659122f6f88ac55f007e201061a73001ad10cb17806		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 10444 bytes

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