Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4527729d28c0459…

MALICIOUS

PDF

81.4 KB Created: 2021-07-14 08:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb25485def6b8c6a415b1e11ff7c82b5 SHA-1: 0465c2dd82dbf89cecca826f45c8ba673b0ad69b SHA-256: e4527729d28c04591de9a4b83a5cdfba62827f3bee8acd0e9a83db2157847fe3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, likely intended to redirect the user to a phishing site. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/square?utm_term=chicago+manual+of+style+speech
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee20001cf0e6777f2c39b7/1626218496717/ziduberowiriwevujiwitof.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c75f85664d35b0e673bb/1625802591933/work_and_machines_worksheet_answer_key.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec92ccf83a7f26ecd1cf0e/1626116812526/cooling_system_of_diesel_power_plant.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93585b673687559686b37/1625896325810/revised_new_oxford_modern_english_workbook_7_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e885f696867b2f2daeb9e8/1625851382565/how_do_you_build_a_teleporter_in_minecraft.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee2ac47c5bce1f334ba495/1626221252909/51819769009.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9fb0934d360eb28af4a9/1626120112191/kurt_carr_jesus_can_work_it_out.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92df9025aa46e30d33943/1625894393453/51104855353.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee6e00462f394a1e453074/1626238464975/ulysses_and_odyssey.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e807cdba333063f17a21e5/1625819086065/51932782406.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_off0000da3a.bin
73933aac485d47f58f56ec6caf65c1cdfc3a39d4c25a86d3cd5aabc450c81edb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 17240 bytes
font_01_sfnt_off0001077e.bin
e79da778becb0e361a52d37150e78b2e60031dab4b98f6203537206e79e4f8ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1077E 11072 bytes
font_02_sfnt_off0001213c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1213C 16792 bytes