Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a9ae01ab723e48…

MALICIOUS

PDF

84.0 KB Created: 2021-07-23 01:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebe4abb16fd03f7660688cb814e2d86b SHA-1: 2c3935ede9bd96cf04302abe059750b929cc1ffa SHA-256: e4a9ae01ab723e48ca8147af158724bbcff409934ced6b4d139b947e946c8ed3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests a phishing or malware distribution attempt, likely leveraging social engineering to trick the user into clicking the link. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/X6hrLWyzjlw/square?utm_term=watch+girl+interrupted+free
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f41f7e699a8678c5827a36/1626611582300/65805873996.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ede8d236d517042361896f/1626204370318/97731295139.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e4c8dc37083541b5a7f4/1625875656212/39511996097.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7def97be683581ce2cb61/1625808633378/living_my_passion.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f62988028f4205a4b73d8e/1626745224772/in_database_design_one_to_one_relationship.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f832136e1f0718d7102d46/1626878483307/dutch_shepherd_lab_mix_puppies_for_sale.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4c29f04a1d97017ab87e9/1626653343405/gate_books_for_electronics_and_communication.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2526a9c57c24939316629/1626493546532/waiting_for_prayers_to_be_answered.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f9dd7e87d40c55b6f2461d/1626987902602/passing_out_after_workout.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecabefb3b63f0898f5c7e6/1626123247491/how_to_make_a_public_unturned_server.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f18703f9088a713e6e1702/1626441475429/how_to_tune_a_6_string_banjo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f9dd53cadde6761398daf4/1626987859299/unfabulous_the_toot.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee3952f72ce0266e0f83bf/1626224978575/72197808661.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f8cd0dd6a22c495fc9963e/1626918157811/control_systems_gate_questions_with_solutions.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_off0000e5f5.bin
fd67ff13ac82f290dc8c9ade4b55e73917b0aced802ad7328b95d286ec70ea4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F5 17052 bytes
font_01_sfnt_off000111d6.bin
0e4d61fa26c350aacf089f8bcfbfb4de01612fc66bbb216168482e571bafd428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D6 10704 bytes
font_02_sfnt_off00012a25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A25 16792 bytes

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