Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb41a88f1a44c94f…

MALICIOUS

PDF

82.3 KB Created: 2021-07-18 09:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3da98d6694a85e0a5f9cd5c9e2218dd9 SHA-1: c81c2ba9b99f3559cfac5905d6b55326156e3eff SHA-256: bb41a88f1a44c94f04bf65c6017130d2ce3a31668fd487fad959424aa911beb8
96 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. The presence of embedded URLs suggests a phishing or credential harvesting attempt, or a lure to download a secondary payload. No scripts were extracted, but the overall structure and heuristic firings point to a malicious document designed to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/UZrB20b2Dcg/square?utm_term=harry+potter+and+the+the+goblet+of+fire
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7e01b1c6ee137fa10ee09/1625808923989/lurajituduvurariv.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d3a5f604029b990d3d3/1626111290567/constipation_for_a_week.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e86a4836ee9e0d9b3c1b83/1625844296282/dog_biting_legs_and_feet.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8883a96d8a922b89845e3/1625851962595/inserting_a_tick_in_word.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed897df67381323ef8eb89/1626179965995/loan_protection_insurance.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f06ed698e33d2cebbdcdd4/1626369750949/dilwale_2015_full_movie_download_hd.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f29bcce13ee976660046b7/1626512332604/sequence_and_series_jee_notes.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee26611f51426150cb7d0f/1626220129595/96794620549.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3c26ca8f65e35b6de1531/1626587756479/listing_of_all_stock_symbols.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_off0000dfa6.bin
4dbac78c494ed684d86e9ecf0759378f2d4f8c2c851db24610c0fcd01137ff3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA6 10856 bytes
font_01_sfnt_off0000f824.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 16792 bytes
font_02_sfnt_off00011036.bin
d3acad8fdb678afea5dadd07f49f67c17d2ba44761d375edb502cb350e57682b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11036 17148 bytes

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