Malicious PDF — malware analysis report

Static analysis result for SHA-256 317233b9c4a854f7…

MALICIOUS

PDF

81.0 KB Created: 2021-02-19 01:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5577e4b74fa2ea46199a38c15773542e SHA-1: b0ed04a3950ae3af6bd4b49f04e7a7b26042e98f SHA-256: 317233b9c4a854f7ef04b940da83f016ec0f20bc48056acd95347fde2246193d
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 0.9995

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://jacksth.ru/123?utm_term=10th+class+maths+formulas+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489583/normal_6006053c8a87c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421464/normal_6000c1ad0e0df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380536/normal_5ff9ce1fd3f7b.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/hecX4ch/football_2020_season_cancelled.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/huqIgcL/snowball_effect_spongebob_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_601264397f59d.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/Lifjhgh/word_family_definition.pdfIn PDF document text
    • http://devazabekodum.iblogger.org/dubonow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404739/normal_5fcc7aa39e05e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://visisobaropa.epizy.com/nupenotoletedabuvijan.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_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 5588 bytes
SHA-256: 9b9ffb51c9cf9b990a96943c1bd92a3592e97140934d4d189b2e3111a99ca4b9
font_01_sfnt_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 13548 bytes
SHA-256: 84d4e0851dfa14e969ff9542bb0413418e9bc0aaf271373ad7144f45b148bece
font_02_sfnt_off000121e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6