Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7fac7729c1b9f5…

MALICIOUS

PDF

79.9 KB Created: 2021-07-16 03:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dee35f06d88a6a8ffa97adb375c38865 SHA-1: d49726a3c82c515a2721a2c7c69c7107cc35b81c SHA-256: 8a7fac7729c1b9f5496c36712f5fe6d6a77d01cfd0aa9717776dc2feb1ef921f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded URLs that point to various PDF documents, suggesting a potential phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to direct users to malicious content or forms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8666

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/~3/5VO7y1TeAqQ/square?utm_term=movie+poster+text+font
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7e45128bb5f4f5163c817/1625810001741/xuvikapesijubafudaje.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee92fc27fa864c7d161083/1626247932367/mofusawemozejuli.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f04a614a8bf902ee072402/1626360417827/calculate_kp_for_the_reaction.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f061c356d57e6ac3d2b31a/1626366403362/lopudos.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e775caed8d191f65460347/1625781706121/japanese_poached_chicken.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79df8bb04542cee377a2/1626110431909/romance_anime_with_fighting.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f041e391893d3c039947fb/1626358244017/social_psychology_by_baron_and_byrne.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_off0000d76d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 16792 bytes
font_01_sfnt_off0000ef7f.bin
201663a2e0f45a0d5b4b54a6be35251ca4a52dbc5e4bbb70af1a2cd81ade6b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 17068 bytes
font_02_sfnt_off00011c42.bin
63b021a8297dfe12ef16614db52232c306d707e00740832d87e148ecea9dcd0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C42 10304 bytes

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