Malicious PDF — malware analysis report

Static analysis result for SHA-256 918b812c7a3b716f…

MALICIOUS

PDF

81.2 KB Created: 2021-07-13 12:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d68dead5106604df52e5355db32e5705 SHA-1: 19a14f530497de5c9686f96171bb093bf0593010 SHA-256: 918b812c7a3b716f829260bd07146f3cdeba01d85c8175938d888daa144f0088
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs that point to seemingly benign external resources, likely used as a lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of embedded URLs and the malware detection strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8365

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/~3/0YvHz_IItD0/square?utm_term=loaves+and+fishes+st+louis
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7767a52db4a70f0fde666/1625781882141/design_thinking_and_project_management.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eca0e81996685841ab63fe/1626120424930/federal_and_state_laws.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d66e38670b5817c4c662/1625871982314/self_crucifixion_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec84e33a853d606aecb921/1626113251757/rotation_counterclockwise_90.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed4f2efb5306426ecd5408/1626165038378/the_air_glow.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_off0000d9bc.bin
c60a4cf80dbf8dd7d90a97eeee0d653482c99a631f6b85e6ee4b752c938a9d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 10476 bytes
font_01_sfnt_off0000f17b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF17B 16792 bytes
font_02_sfnt_off0001098d.bin
aec1245237d2991e22eeb67d1ec68a17fb1e0931124ea44d2c12a0e8d474048e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 17520 bytes

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