Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1de27f70837cf58…

MALICIOUS

PDF

81.7 KB Created: 2021-07-15 21:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d857934729220f767b0452204389a6aa SHA-1: ea92bbd0606654f6382e4f6ad7d43d06d22a909a SHA-256: c1de27f70837cf58b3bb0f3af5e358be87c6db5b72cf39897231c7020983b65d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The PDF contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a Squarespace domain hosting PDF files. While the specific URLs extracted were benign, the overall detection and the presence of an embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=sources+of+data+in+research+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec78563a853d606aeb459e/1626110039078/worksheet_of_weather.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed44844918f36a6d5e6cae/1626162309537/raw_greater_sagefish_classic.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ede3bd80caa629c1dcb347/1626203069159/biceps_and_triceps_workout_for_beginners.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec789cc217102653d50636/1626110108250/60009354804.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7e01845e16b3be7ea0f4e/1625808920607/52454321783.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7df5e5c13cc4fedeb1133/1625808734196/gejudaxuwolutire.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9414012fb7d0b279470a4/1625899328424/call_of_duty_beta_apk_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed0ba3c50d503b9d53c1cc/1626147747277/71161796006.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7ef4df4d7c53d8b140668/1625812813901/grep_command_meaning.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_off0000dcc7.bin
1b47b6d1dad25a2f0e4820eac5e0fd4cde431bbb732dc892c6c15ab0ab8fb0d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 17104 bytes
font_01_sfnt_off000109bb.bin
f35b59030dfbe7ebe10627f10e9b5269b19c49c91fd10554b9e583303cfa6b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 10844 bytes
font_02_sfnt_off000122aa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122AA 16792 bytes