Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce58ae3e7efe9697…

MALICIOUS

PDF

201.6 KB Created: 2021-05-05 12:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 236b1d474a8ac3e6a44efbad927b8e09 SHA-1: 7e139221d9ecc74baf9e3f0fa1f26d3b87e4046a SHA-256: ce58ae3e7efe9697adb0873945fb3de2773be03dd4e7181020731f731ec3f48a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. Additionally, a high-severity heuristic indicates a password-protected archive lure, suggesting the document is designed to trick users into downloading further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL and the archive lure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dafemum.ru/strik?utm_term=algebra+lineal+y+sus+aplicaciones+solucionario In PDF document text
    • http://juxilafodov.iblogger.org/76971931594.pdfIn PDF document text
    • http://kinokaiff.space/refraction_through_prism_class_12i7v9d.pdfIn PDF document text
    • https://dukinuvofipul.weebly.com/uploads/1/3/2/7/132711936/20e1605f0a4afdf.pdfIn PDF document text
    • https://baxemazone.weebly.com/uploads/1/3/0/7/130739829/fonegijelidazop-laxeje-jalukovozekidi.pdfIn PDF document text
    • http://liketsven.xyz/353139518601ik9s.pdfIn PDF document text
    • http://handler-autoscout24.com/total_gym_supra_pro_parts3xchk.pdfIn PDF document text
    • http://chambre.xyz/what_do_the_colours_on_a_globe_meane6hmt.pdfIn PDF document text
    • http://lukunezevowazol.sportsontheweb.net/collins_cambridge_checkpoint_english_workbook_7_answers.pdfIn PDF document text
    • http://pevilolejuwoju.iblogger.org/le_petit_nicolas_movie_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fd0426790881.pdfIn PDF document text
    • http://toxinudi.22web.org/tamil_calendar_2017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384308/normal_5fce82066243a.pdfIn PDF document text
    • https://lagomumudalo.weebly.com/uploads/1/3/2/6/132681699/guzisofupefoveg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://renoxebanojiwak.epizy.com/clasificacion_de_antibioticos_de_uso_veterinario.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/38093654003.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/44217683520.pdfIn PDF document text
    • http://dasopikabuma.rf.gd/ruligetakadam.pdfIn PDF document text
    • http://dimafox.epizy.com/ambarsariya_suit_suit_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C682 5132 bytes
SHA-256: 64ad6113ae288d69a6932f9ea2622ef64ed1b72375de1580dfeab1c81a0548e2
font_01_sfnt_off0002d7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7F5 14660 bytes
SHA-256: 321f2f8dc5f400795cacff6fdce6fb3a936a4420804eaf05d9d2ef4ec4921da4
font_02_sfnt_off00030749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30749 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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