Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec354b0b2a6dc5c…

MALICIOUS

PDF

78.4 KB Created: 2021-07-18 07:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3f16e73f263419e755783ce0a432bc2 SHA-1: d7b87da101ad00d19aff4441b2bf30efb4da7c8c SHA-256: 0ec354b0b2a6dc5c0b9d4ae909528392648d2987b87b38305b39ddd9bfc710f7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that point to external resources, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8287

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/qI_NY8u86tA/square?utm_term=film+history+an+introduction+pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0ee27c825a553dff1c42b/1626402344008/question_tag_these_those.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f19eb1d8711e77f9d6601b/1626447537686/80879451528.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1343746c0d74f87df306e/1626420279817/boneluriwekanudakubawe.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f01fb5d9659e27864771ab/1626349493328/hell_with_it.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0f63a4bb49071de170c61/1626404410257/need_for_speed_carbon_android_apk_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3b1235f13a15bd822eb46/1626583331723/grilled_zucchini_and_potatoes.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_off0000d3ff.bin
16c156fd78eb8caf768f4985538ea9cfaeb8d61ce4d86b0e8d792e55a96a2cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FF 15796 bytes
font_01_sfnt_off0000fc8f.bin
00926a596fb8f4e81641b541937d7936af657c983a1262cc01f98a3714ea0423		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 10944 bytes
font_02_sfnt_off000115ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 16792 bytes

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