Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c187b734e6729b…

MALICIOUS

PDF

80.3 KB Created: 2021-07-13 22:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e43036c55f85553b866b1de605f41703 SHA-1: eccac0fa52a5c8a7ea4c8bf4ea3bc9c1d6238b24 SHA-256: f5c187b734e6729b353f39a95b7d60002842445d8344debfbd2489923dfa4c38
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'irlanc.ru', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it's designed to trick users into visiting this external URL, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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://irlanc.ru/square?utm_term=biology+notes+for+neet+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7e23181ab8d1aa9df4c8c/1625809457476/fifa_18_ppsspp_zip_file_download.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecb30e786e7e037ecbaebe/1626125070711/zavoparixekatewawi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8708de8c3264fe5f4dc1/1626113800289/zulekilizibit.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9367f83a7f26ecd1d829/1626116967038/chiweenie_puppies_for_sale_near_me.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e786d136e647108f2a3d74/1625786065735/31237039823.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e79487d93aeb546a104862/1625789575515/80307637319.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7b734027437375959191/1626110836610/in_another_world_with_my_smartphone_light_novel_epub.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_off0000d587.bin
b611b80ddee406ad5b1486885064610bcfdf1405fd0fcbe5c3960815ee1b0e62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD587 17304 bytes
font_01_sfnt_off00010329.bin
4d5cc444215146890951920bff27056545dc4d3859b27f06f16a860accde1c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 10680 bytes
font_02_sfnt_off00011b95.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B95 16792 bytes

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