Malicious PDF — malware analysis report

Static analysis result for SHA-256 205f068e5f0a7a15…

MALICIOUS

PDF

79.4 KB Created: 2021-07-14 00:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc55c1f9e0682b2566412a88010b0c46 SHA-1: 68f76813bc8007c6e82cb404da88fccb4fd7a219 SHA-256: 205f068e5f0a7a15bbea3d25a62716ec24b3f2c56eefcc5249886f859416f468
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, with critical heuristics indicating a lure for recovery secrets or private keys. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing attempt, likely delivered as a spearphishing attachment. The document's content, though heavily obfuscated in the provided excerpt, is indicative of a social engineering tactic to extract sensitive user information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5764

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/~3/5Aj-mlxkUx8/square?utm_term=kabuliwala+by+rabindranath+tagore+questions+and+answers+in+english
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94870b132fa362074c32e/1625901168193/how_to_compute_binomial_probability_in_excel.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a1c5fdc75e32ab04544d/1625792965719/talking_to_strangers_on_omegle.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7e6c82b4c978cf410f1c/1626111596521/koribagaxawa.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edff0f172ba47bdac7490e/1626210063740/encrypt_with_public_key_and_decrypt_with_private_key_c.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_off0000d434.bin
4df066aad65f535f558c22041e9d94382d3e684fd52b856ce69062670e5315e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD434 16080 bytes
font_01_sfnt_off0000fdb5.bin
4e5b5e332f0f4015a036763db1d0bc381d376218681d3920547ffd237cdf1bf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 11104 bytes
font_02_sfnt_off00011714.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11714 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.