Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e62c456320cd5b…

MALICIOUS

PDF

86.4 KB Created: 2021-07-16 14:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 383ca6736d91f52704b2c608b87c157d SHA-1: 816e0748a5adde175a170f79d706bb15da76c23f SHA-256: a6e62c456320cd5b481eea697050626fdc0684fa129821bba63a834bcb3a22f5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains embedded URIs, one of which points to a potentially malicious domain. Although no scripts were explicitly extracted, the presence of embedded URIs and the ML classification suggest an attempt to redirect the user to a harmful site, likely for phishing or to download further malware. The document body was unreadable, preventing a more specific analysis of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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/iXsW93xxTQA/square?utm_term=lady+charlotte+diana+spencer
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee7ce81f51426150d09f28/1626242280482/19015686531.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed80dff67381323ef87008/1626177759936/28232959423.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0b8ba7ffd90482e30a4d1/1626388666802/82673270878.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee70c433d4654651c0721f/1626239172500/definition_of_predicate_in_grammar.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0920305c5b26a1272bb4d/1626378755885/very_good_morning_images_hd.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9197137da2614570ddd7e/1625889137701/definition_of_manual_dexterity.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f06cf2fa9d7013435db4d0/1626369266397/9302947153.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8f1bcc14ff043cd5aa52e/1625878972215/73882371603.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e867ba661a887b00005c84/1625843642897/cbse_class_8_maths_chapter_1_exercise_1.1_solutions.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_off0000efaf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 16792 bytes
font_01_sfnt_off000107c1.bin
010f16a0e8fb5fdf1147e8a82f295361250c343f17b3f2611421ee92abb6c606
pdf-font-stream PDF embedded font (sfnt) at offset 0x107C1 17376 bytes
font_02_sfnt_off00013527.bin
2d1ffc5d182458fa8c9fec7aa74f46813a22ead300d6912c8f33235cedd2873f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13527 10680 bytes