Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56bb320e5eeee4d…

MALICIOUS

PDF

72.6 KB Created: 2021-07-14 08:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d084065264560064e6a0559d6b7657e4 SHA-1: c22d7b2a46c0b957c16f8f84e499a3975d92976f SHA-256: e56bb320e5eeee4d8c0ac537fc5721bb4e85a520c3aa23d6d1ca11dd0f18513d
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The presence of a 'download button' heuristic further suggests a social engineering attempt to trick the user into downloading a payload. No scripts were extracted, but the overall pattern indicates a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/square?utm_term=bewise+classes+chemistry+notes+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7f1f7726b430b467d545/1626111775588/how_many_solutions_does_this_graph_have.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94689b67368755968d8fd/1625900681920/jesus_christ_god_and_the_holy_spirit.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e846fc2f85bf4fcbe800de/1625835260945/vukikatawovolelamas.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e848ded602fc26e46d13bc/1625835742377/boxotogurobubolex.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_off0000ba0d.bin
36cf381d5936cdcc4127509eb1b131862a89e98fa554d06bb4e1c204b78cc077		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0D 16184 bytes
font_01_sfnt_off0000e45c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 16792 bytes
font_02_sfnt_off0000fc73.bin
8d292031d0b63027342248d2cbfa2236e6dc1eb385542d3b9f8c61aaaa7189eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 11140 bytes

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