Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c833862adbb268…

MALICIOUS

PDF

91.8 KB Created: 2021-07-15 15:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd30f116c6985d61b715fce665f3de37 SHA-1: b21b61311e811cd08dec9452d0561a8cc60104c6 SHA-256: b8c833862adbb2688edb848dede541ca8788d20fe504584ab1f51b01ae1be6dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI that points to a Squarespace domain, which is often used for hosting phishing pages or malware. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further infection. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8712

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/gOBB6uaVNRA/square?utm_term=impact+of+biodiversity+on+human+population+growth
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efd2c716a6d35a11114a10/1626329799111/most_realistic_car_mechanic_game.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efe0ecc00d13116b42fdf5/1626333420620/darumudijisizifofimafizi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e818c585664d35b0ea01da/1625823429989/64605365316.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ede75f2e8a4a2aca7af70f/1626204000128/zadazokivovejikagujif.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e886e51f1f218d673cba/1625876614881/convert_mac_mail_to_pst.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed7082a17c7f1bf003c52a/1626173570351/bible_filthy_rags_verse.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e78e885c13cc4fede62668/1625788040420/ramukurizejafatapepiw.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_off000101cf.bin
19f90518e7ca1e118ae1116e13083deab514b2bfb52a15dbcd35181eb4a21024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 11524 bytes
font_01_sfnt_off00011c95.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C95 16792 bytes
font_02_sfnt_off000134a7.bin
ad128c3a137d6b0213a2e01666ecc4a0edc715aab879a85c0d599aea971142da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134A7 17876 bytes

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