Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fcaf857cb75cd2…

MALICIOUS

PDF

86.8 KB Created: 2021-07-22 00:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c89c111e843fd3279f23a55bb0fdf6b6 SHA-1: 2689ab35d66e568dc57ce0994db10a3d67e27dcb SHA-256: 21fcaf857cb75cd286def1516d959340cdfec8319d1e5c783c512e6552f3ef13
96 Risk Score

Malware Insights

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

This PDF was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URIs suggests an attempt to lure the user to external resources, potentially for phishing or malware distribution. While the document body is heavily obfuscated, the overall detection profile points towards a malicious PDF, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/-7-cX3opz_8/square?utm_term=so+this+is+christmas+piano PDF link annotation
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f04f12bb85c5336a62c590/1626361618378/paxiveramimup.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f05edf173e047f00a60b3c/1626365664041/coach_carr_quotes.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f4c8e9d68f3225906a553f/1626654954050/show_equation_in_excel_graph.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f38d3480d83038fa85204e/1626574133046/cover_letter_format_in_nigeria.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4abfc860d895b4836fd6b/1626647548203/raloluxitosakaberuzibi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1379aadf71e7547cdaf2c/1626421146254/givikiwupojaxinuwiroxu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3b9b1c2d40e67ec0f6a93/1626585521750/wanted_zin_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7a88fadf2c26882fdb7b4/1625794703771/attack_on_titan_mod_apk_unlimited_money.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f50e255f13a15bd833fbb4/1626672677831/70512148518.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee6c760981f36585a501cb/1626238071056/wipesawub.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8ae22de9850677744dc3/1626114786794/gajikunelataxixadanoxor.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede7d5537dfa2004057c84/1626204117747/arts_administration_cover_letter.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f87e8471f2bc76963240bf/1626898052375/science_in_action_7_textbook.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4ac0eb84a576e6c0f51f9/1626647566483/bezinamitokejijerofep.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f66468132d7d1ce064025b/1626760296505/experiment_on_newtons_first_law_of_motion.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eddc25e11d817478d19384/1626201125178/9184057964.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7eb812c1416d2f1a49dd/1626111672920/nasokurebutepapemas.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e91e6d3ba7d954d5461678/1625890413808/wuninej.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edae4a5860d606f4840332/1626189386253/maplestory_how_to_transfer_cash_items_between_characters.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 17716 bytes
SHA-256: 32f92d7ab738f24527564d478247fe538262225e274a0601c26ced03483fa926
font_02_sfnt_off000134e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E5 10536 bytes
SHA-256: f35480a54b00ce7a6640573550aefd79069e00ff7a81d606909f1cd3d33f113a