Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59534180299c55e…

MALICIOUS

PDF

80.8 KB Created: 2021-07-17 02:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 817d9d819da7265c548395ca3b10ec18 SHA-1: 10502c715b46d67c84e739c7e98534fbaf4bbbb0 SHA-256: d59534180299c55ea8495eb90c10748fda0ed1f0c6990514f5536918c6501f80
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An embedded URI points to a URL that, while currently classified as benign, is suspicious in the context of a malicious PDF. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of embedded URLs suggests an attempt to redirect the user to a potentially harmful site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/qI_NY8u86tA/square?utm_term=tamil+serial+today+zee+tamil
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8189947cc46ca1285ba4/1626112393645/51086031456.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed837af95b5524f9546e9e/1626178426829/modern_software_engineering_notes.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0d2529014c44c528b198d/1626395219009/one_day_by_day.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f201cabe244e0bce661fb1/1626472906914/it_is_also_known_as_high_blood_pressure.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f09bc76f60a93de03f7094/1626381255231/77664800542.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_off0000dc51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 16792 bytes
font_01_sfnt_off0000f463.bin
cb7826880c6d8a78e61fa9a0052fcd8db20256b3a8e29d661fc922d9ece1321e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 16600 bytes
font_02_sfnt_off00011fdd.bin
a0ea328e36e510f228fd70857f0fb92466f706591566bfcab60f80062fb49877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 10440 bytes

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