Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce02d27632ac28c…

MALICIOUS

PDF

78.8 KB Created: 2021-07-13 16:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 793e83ce966c7afb3d41e33b896366c3 SHA-1: 829cc9bcd4b1f98ce3d3b53da7a0800fe9416173 SHA-256: fce02d27632ac28c8b75f1c14933395f32e00dd7540e47ee2758be7d1f224e8e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, even if some are confirmed benign, suggests an attempt to direct the user to external resources. The document body is heavily obfuscated, but the overall structure and heuristic firings point towards a phishing or malware distribution attempt, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9478

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/sq/ugae/~3/W5vEtEh6t-A/square?utm_term=ict+tools+used+in+classroom+teaching
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed133ca17c7f1bf0ffbdeb/1626149692960/buwudamukewonobozabul.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e95996aa30721e65f0b55f/1625905558269/fikefofonidirufapitat.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e916d03f195e1e4035f9da/1625888464914/tawemij.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e853f6d2ae9d691971e48b/1625838582325/69926279728.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e87902c2683467d4f2cb1d/1625848066807/how_to_be_a_prayer_warrior.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e86e7fe0b7df382a7f1380/1625845375381/33641393221.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca79880388a1034da7ff0/1626122136738/cute_goodmorning_texts_to_him.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed8c49c1f2f61945a53d18/1626180681292/malasudititarumumum.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_off0000d46f.bin
1dc55269b180e28028755140b62fa67957e9ec73f4caf125f681ff51e0a5368f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD46F 10868 bytes
font_01_sfnt_off0000ed1d.bin
80bf696cdea5ad9a07d83252ef057c98fe15f069b0c160a093fd112ea69d8b9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 16212 bytes
font_02_sfnt_off000116cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116CF 16792 bytes