Malicious PDF — malware analysis report

Static analysis result for SHA-256 65963b1493934de5…

MALICIOUS

PDF

82.0 KB Created: 2021-07-22 01:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4884320795e43f6ee88ab6b9556a3401 SHA-1: 8fb53400cf759077b35ff2dc831dbe02333ebcc7 SHA-256: 65963b1493934de59e5ffe59d0bba39f53a6bc385836caa4e18288e60530ed92
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains an embedded URL that, while currently flagged as benign, is indicative of a phishing or credential harvesting attempt. The PDF structure and metadata suggest it was generated by wkhtmltopdf, a tool often used to create documents that mimic legitimate content to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/uzX87CUNjRg/square?utm_term=the+year+king+uzziah+died
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2f2d0ebca9b5ae8e72ab6/1626534608325/39363087888.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7dd87e2b6271615ada76/1626111448389/galowumalinawamijo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3c7c6d68f3225905e5bb7/1626589126278/the_best_conductor_of_electricity.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91c15db8bb141bad93106/1625889813197/cell_biology_quiz_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f88af8e331571577cf53d8/1626901240537/is_15652_electrical_rubber_mat.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5f31cea0de21e9b2d0d1e/1626731292850/kuvekidefamup.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8a77a3e9df788e6e0c6c/1626114679365/lord_of_the_flies_chapter_8_quiz.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f858fccc3f8a3514d12ecc/1626888444559/types_of_single_replacement_reactions.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3390e6678663e6a2f23ea/1626552590227/82851258130.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0a264b45d123851ccfff9/1626382948409/55275947006.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f02c0de00eb31d7cef9961/1626352653593/strength_of_materials_3rd_edition.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60efe78536870d1a2db64df6/1626335109736/wizogewizunalire.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3b9efa9adb72803ab6a02/1626585583719/oxford_current_english_translation_book_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee7e329b1e4d6a3610d618/1626242610487/temomavolufelumenipeli.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee0053ac614e13d133884e/1626210387562/best_free_ad_blocker_for_android.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e95bebc91b61347ea54c1e/1625906155800/promissory_note_purchase_agreement.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f4c6f89c57c249394c3c93/1626654456888/10404210474.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f38af154c26a0cc3fe8780/1626573553655/double_beam_atomic_absorption_spectrophotometer.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f214ae3f474e6f1b1a1ce3/1626477742517/74794162807.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f31690e13ee9766604ee75/1626543760527/auditing_and_assurance_services_7th_edition.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_off0000e1d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D6 16792 bytes
font_01_sfnt_off0000f9e8.bin
89204735466450399670b11b1b683683674376b83b5e4a4414fe7045633fdaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E8 16412 bytes
font_02_sfnt_off00012452.bin
d45903d7d4321eed18453342b9a546c4902b6d4181dfac2c753cb9c658524c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 10424 bytes

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