Malicious PDF — malware analysis report

Static analysis result for SHA-256 431dd33f57681394…

MALICIOUS

PDF

78.6 KB Created: 2021-07-14 01:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9104875f63f781f8ca73cc5b9e4b527f SHA-1: cd2038391de104be19aca0078cf7960a54ec2d82 SHA-256: 431dd33f57681394a057d0ca9cb02a7cf844351e194625888aefcff3ec77edff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is a Google Feedproxy URL that redirects to a Squarespace domain, suggesting a potential phishing or malware distribution vector. The obfuscated document body and the presence of PDF-specific heuristics further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/pL_UGxDroB4/square?utm_term=spuntini+byres+road+delivery
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e85de394f5f525264dfdab/1625841123280/tudojevinela.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e940dbb67368755968bddf/1625899227799/zisalawizutek.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee002437ddb5439bfa947a/1626210340921/67792377236.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8126eafd06e4982ec8750/1625821806337/girl_quotes_about_herself.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edf47280caa629c1de9884/1626207346443/fokilogejemiwosuginuji.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9a924f558d0bf39df336/1626118803081/gitimux.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_off0000ce1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 16792 bytes
font_01_sfnt_off0000e631.bin
6b124706f719246e12e6bc7e9df4fe110f85552d34150d54fc5fb2d208409f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 10880 bytes
font_02_sfnt_off0000ff44.bin
9bd1806d9cc47e51010cd5685e4792c704d91ea4c176f5ef20872ad30c053482		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 17456 bytes

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