Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8133672d04c44b2…

MALICIOUS

PDF

125.2 KB Created: 2021-07-14 00:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bfb8a6ea008d2f04ae1ae85d64619b6 SHA-1: eac4215cefb88e5aaf37117d72d04a76ef927fe8 SHA-256: f8133672d04c44b27f6b642458dcb823254220241d21dee3b87962e1fe3e4a49
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an embedded URI pointing to a potentially malicious domain suggests an attempt to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall indicators point to a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9716

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/sq/ugae/~3/u8n3KCQdUYc/square?utm_term=not+belong+to+a+non+mendelian+law+of+inheritance
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e864491cdec93718076ce5/1625842761423/taxes_and_government_spending_worksheet_answers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94a5618245d33f182fe1b/1625901654661/81819838970.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edf9964485e4216904b4e3/1626208662423/new_right_sociologists.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7f782d0799e4214c18e03/1625814914453/if_two_waves_of_same_frequency_and_same_amplitude_respectively_on_superposition.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8540d3c986c05397245d9/1625838605720/nupevugeze.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edded8ea8d40126a1c07ac/1626201816840/another_word_for_deep_red.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec899a154eb17b684a93d6/1626114458119/rixogegarifefetapaj.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e837feed7e630439680ec0/1625831422137/guadalupe_county_appraisal.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edff90c450ee473082ab72/1626210192750/human_anatomy_atlas_2020_free_download_for_pc.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_off00018a2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A2A 16792 bytes
font_01_sfnt_off0001a241.bin
bf4a516a9ae56c8c1d6a8d0b86e7f61ef514180385c169a6a93226d4c20aeac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A241 10956 bytes
font_02_sfnt_off0001bb4c.bin
78ebd496a463810117e69c207a62b28967884390f4232b36829a6a048dc210a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB4C 17168 bytes

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