Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c11fc3939a6ee5d…

MALICIOUS

PDF

81.9 KB Created: 2021-07-13 12:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4dabaea98df01e5e9840e25d7e5939d7 SHA-1: 73f9acedfb5bbcfad57c4b683428e58e463a3040 SHA-256: 1c11fc3939a6ee5de065dcd5c653cb166e97a623d176f54866827ef09bdc2ec4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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/~3/4P1vZUbBa90/square?utm_term=meaning+of+frown+in+telugu
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ece2d5fb5306426ec76e34/1626137302024/domestic_waste_types.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecc1e94969f715b3f27f89/1626128873990/78873807467.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec92a61cff58014d54f5d2/1626116774993/kukabewi.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e93f948fb24157da71134b/1625898900881/how_to_convert_files_into_word_files.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e95c5819a9f87deb74991a/1625906265028/lijewa.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec80f4e64ce53716348edf/1626112244632/wurugaxiwod.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e0ea83ae0c49023596d9/1625874666930/blessing_and_cursing_deuteronomy.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9319c6e267257943b67e0/1625895324342/iso_10017_free_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e85a1c93ef813e1d02929c/1625840157010/cc_timeline_song.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e953c2f4fe78435a3c32bc/1625904066300/how_to_combine_files_on_windows_7.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca78811a746407a44beca/1626122120229/zafili.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d362.bin
562a56c10562c9ea2506f561422b48aa75fd09b2718d5efbc204af94dfa68da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD362 18192 bytes
font_01_sfnt_off00010319.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10319 16792 bytes
font_02_sfnt_off00011b26.bin
bb43a141501f42932694c859ebdf6aecc7f12bf4ac5b20e48008c887f64208c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B26 1720 bytes
font_03_sfnt_off0001234d.bin
5db1b6bcdc8c3406294928a07493757c9dfa6ef42364707e16752da3babdb9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 10400 bytes

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