Malicious PDF — malware analysis report

Static analysis result for SHA-256 3601f5395a949275…

MALICIOUS

PDF

75.3 KB Created: 2021-02-23 07:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c3369b2a0bf9925c8af1afb6657e40c6 SHA-1: 143fab32937d8c86b6b3c06e5e6b1792e8f79941 SHA-256: 3601f5395a9492759972dab08be40b600e91de40d5cc4c41738925dea3df3b18
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a domain associated with phishing. The document body, though heavily obfuscated, appears to be a lure related to job salary information. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent, likely for phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=how+much+does+a+mechanic+apprentice+make PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487665/normal_6017be47da9b5.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/8wchDie/zimijodajuvuvibijewu.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/kgcjbgi/14684180102.pdfIn PDF document text
    • https://cdn.sqhk.co/sogupavetut/R2FPHm5/daburoj.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/fhdicjJ/kiss_of_war_elite_officer_badge.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/uV6zgei/35073410646.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450878/normal_5fde8bc58727b.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/jbjhCc8/walesi_bardok_angol_forditas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_6016a5671db2f.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/coDk4if/muzowopusiwetovezanog.pdfIn PDF document text
    • https://cdn.sqhk.co/zorezikuluz/cIhbjhb/46683121751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fe1ac92b6fca.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/oSdzgdv/heartbreaking_life_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_6013e4c21c8a3.pdfIn PDF document text
    • http://trokot-new.online/resumen_del_libro_el_arte_de_amargarse_la_vidaaa0fw.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/telasebisu/83499970558.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/practical_clinical_skills_ekg_reference_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/hills_w_d_dog_food_feeding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/3625253354.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/nogokudoduragobone.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 5400 bytes
SHA-256: 23730c1051ed9f7bdb982d844e902e56d9ab43458d60e17b25e10193cc0152f9
font_01_sfnt_off0000fa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3B 11004 bytes
SHA-256: 6281205973d1117f39c6f027bb18ccb9731e592bd852d6680cb230db673b4174

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