Malicious PDF — malware analysis report

Static analysis result for SHA-256 404423d3ac60ee04…

MALICIOUS

PDF

80.0 KB Created: 2021-07-14 00:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4058a3e0a75bce97f7175e4308db1400 SHA-1: 5fd4529dfe6a4078a3331112b69d2d401cc8a684 SHA-256: 404423d3ac60ee0470d037424d01e387d2ff5c82914fe3d3dd138cc0c6c6e9c2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the file's structure and detection results point towards a malicious intent, likely related to initial access via spearphishing.

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://feedproxy.google.com/~r/razvivatel/yapz/~3/IdU8rIDf9lQ/square?utm_term=duck+drawing+for+kids
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed9f368b6fd7287615656a/1626185526618/tepofipokotekub.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8607e82957a3103692274/1625841790191/dead_by_daylight_myers_build.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7f3ce4261ba798062002e/1625813966858/coking_coal_producers.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e86da5f9d8d7554bf240cc/1625845157296/play_store_gta_vice_city_free_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e82e184d2175279d16e141/1625828888879/download_12_rules_for_life.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec78ec59713006cbe0392b/1626110189634/intermediate_accounting_chapter_19_solutions.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee0008e55429721e24d1d2/1626210312702/low_quality_meaning.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_off0000d5b3.bin
3fb19c3f9eb8eda570475a6a5e3ba53cf5bc7ffe4a644a6b61beb61936be2b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 10656 bytes
font_01_sfnt_off0000ee16.bin
d6faf7996c4eadabb7a687c2224658a948c21e636c15e8c9103232f2a3b04dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 17156 bytes
font_02_sfnt_off00011ac4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC4 16792 bytes

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