Malicious PDF — malware analysis report

Static analysis result for SHA-256 175c5e40ac2cb660…

MALICIOUS

PDF

76.2 KB Created: 2021-07-15 16:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65c9bb66307f6b5e532bb6a26345039a SHA-1: ce602522435b71db1325cefb525ec5e8d45f751b SHA-256: 175c5e40ac2cb6600db173c3abe64305a83507f0313b6ee18c4ccc611c738be0
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a visual download button lure suggests a phishing or social engineering attack. While several URLs were extracted, they were all confirmed as benign, and no scripts were found within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/~3/4P1vZUbBa90/square?utm_term=launch+meaning+in+english
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f02d1b5d627c4551e480ec/1626352923376/crude_oil_prices_today_per_barrel_today.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee07088f209f4d8288287c/1626212104349/birth_certificate_registered_number.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7b15fe8ef4d41b4f87de8/1625796959849/kovokonijivame.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0680a9aa746350d03a78/1626211968171/26609292424.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee12455f7927514e39e30d/1626214981659/yea_lord_we_greet_thee.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed96305a30a704d0bf6192/1626183216941/uh_math_placement_test_answers.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_off0000c7e8.bin
61c76cbf611cd3b4540a5317306392d2baa6190b7b77681fd30c87796357f58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 10416 bytes
font_01_sfnt_off0000df36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 16792 bytes
font_02_sfnt_off0000f748.bin
7f262a08254480b46e3dee98458f3ed798312d0719a89320503da77a8f251cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 16972 bytes

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