Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef5e48b7e4a192f…

MALICIOUS

PDF

79.0 KB Created: 2021-07-14 03:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 783e23ffd0148df48e9aca8ead91e88c SHA-1: 4ea38d8a2bfcbd4ba4695db28da62a735c10bc6e SHA-256: 0ef5e48b7e4a192fc8e7c6847463ab347efad8a27d8a510b772c3e782cf1efdb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs that redirect to external sites, suggesting a phishing or malware distribution vector. The presence of PDF-specific heuristics and the nature of the embedded URLs point towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/WVKuihPcy9U/square?utm_term=can+you+thin+acrylic+paint+with+water+for+airbrushing
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edfed6e7c05a53525a67bb/1626210006309/find_the_area_under_the_curve_over_the_interval.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec91b169d4b63361481a77/1626116530167/3145355205.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7eba045e16b3be7ea81b8/1625811872441/minecraft_pc_keyboard_commands.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e79e03e8ef4d41b4f73285/1625792003704/nubovupevaxevasanako.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec77f331b0b43e07e5a295/1626109939900/do_not_take_it_for_granted_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_off0000d28b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD28B 16792 bytes
font_01_sfnt_off0000eaa2.bin
1d1686653218a23c9f4c7093e4477db19ff29d27bd4751344b47f92acfc8bf25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 11228 bytes
font_02_sfnt_off000104cc.bin
4da6a227c9138e324e26b6edb5cffb9ea660f464a9543b41e4a4711905767100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CC 16532 bytes

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