Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff08615bde586df6…

MALICIOUS

PDF

81.4 KB Created: 2020-11-10 06:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5396374cbb8fe4dbfbe8b2ea9d2ea2d4 SHA-1: b7bd7c64b075664e016b65ea0ca08f02c7213726 SHA-256: ff08615bde586df6296d81abf1187b4ead7a83f730ebc4b0333e7ecedf088df1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/strik?keyword=ti+nspire+cas+touchpad+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408475/normal_5f95f9e0d1ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f9e8ab673dd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/82076188927.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/34124385488.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/32575110814.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/schwinn_moab_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6e7a61-fa19-4942-9582-9ded03fdc55c/pythagorean_theorem_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/map_of_continents_and_oceans.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/physical_science_with_earth_and_space_science_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/free_guidelines_of_the_keto_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/bikebuduvud/the_book_thief_test_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80638eef-9c6a-417e-a946-7fd7671893d6/82470082668.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://scripts.sil.org/OFLIn 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_off0000e6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CF 5160 bytes
SHA-256: b1ca283cc13760a1240b8bae246e233c690bf3bcfb9528733a74df9073803005
font_01_sfnt_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 12996 bytes
SHA-256: f6df3c6cda4cac0a9054929cb3dea6dc565d6822d675098e4b1cd262c8ced39c
font_02_sfnt_off000123a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A6 16140 bytes
SHA-256: 00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107