Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d4d9a62dc8f6f2…

MALICIOUS

PDF

79.4 KB Created: 2021-07-12 23:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 297246e7388b928bb0da35c8e32c26d2 SHA-1: 30e83c27dcdb4f98b0750f1add73a429364ad7ec SHA-256: c1d4d9a62dc8f6f292efbb465975344fefc3c60409a8016fcef446527f26feb0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL, 'https://queure.ru/square?utm_term=refraction+and+its+laws', which is the primary indicator of malicious intent. The document body is unreadable, but the presence of the URL and the high confidence detection scores strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://queure.ru/square?utm_term=refraction+and+its+laws
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e84b3284a485174d874b26/1625836338224/6x6_crafting_table_minecraft.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e77a9612aad855244c4184/1625782934241/vinokomijofaxenezizuw.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8bd3f3601b306b46f6537/1625865535696/64569917166.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8106ad4a1a22a3e72971/1626112262472/32285286311.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9077a2c5c2f6215c80511/1625884538140/75496730427.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e843c7f0b0395a876f444a/1625834439276/xisezuwowesigezodilas.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7ba824d2175279d11c541/1625799298919/kevakuxujomezekazatu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93ba9c874e7142491ab5/1626117050442/29567320327.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e446ad76c09748fa8c5/1626111556675/nightmare_withered_toy_chica.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f79883ae0c49023743fc/1625880472722/40471229576.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e96719309bd63f3d880fb3/1625909017728/36685330068.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8f1da3f195e1e40343d8b/1625879002997/molal_depression_constant_of_water_is_1.86.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_off0000d6b2.bin
f621b3f3f8aa986c66b4e28a3698cfb8dba7c4c96daf4a4b0e8463f00e36b4e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 10600 bytes
font_01_sfnt_off0000ef17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 16792 bytes
font_02_sfnt_off00010729.bin
0d6e399983c6ed652fe8039ecd8048e49784f54458575cf3e5168bfd3d6450b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 16472 bytes

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