Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25ff86e045f262d…

MALICIOUS

PDF

72.0 KB Created: 2021-07-18 06:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e391ee0309e3d17f8e70b690e149858 SHA-1: 4d35aadc64ffcbb23bb06edce195bd453a0e3dd9 SHA-256: e25ff86e045f262df503d02758fc6e372f6e70b03e73fef7d4f4222efd3c75fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL that points to a Google feedproxy, which in turn redirects to a Squarespace domain. While the specific Squarespace URLs appear benign, the overall detection suggests a phishing or malware delivery attempt. No scripts were extracted, but the presence of embedded URLs and the nature of the detections point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8216

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/X6hrLWyzjlw/square?utm_term=discovery+rule+statute+of+limitations
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f151fe96ce9b33d7324caa/1626427903008/6340884802.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7714c268f363b0857e40/1626109716480/63647987598.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee44c57dee9f188f7902d3/1626227909222/89816700433.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e76fa14abb634903c8fc66/1625780129944/mopofapexutumilu.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e914ecc22c005c93382f11/1625887980581/marrow_meaning_in_malayalam.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_off0000be96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE96 16792 bytes
font_01_sfnt_off0000d6a8.bin
0cb9eaa98df1a13db714a95b09e4749de45bb51b5893c5513a35bc71feb3de33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 14724 bytes
font_02_sfnt_off0000fb7b.bin
a0834b7fd6210a993945b2637924983a8c97108019d24dca4d2ca308ad26d6c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7B 10780 bytes

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