Malicious PDF — malware analysis report

Static analysis result for SHA-256 c771da29caec9d47…

MALICIOUS

PDF

74.2 KB Created: 2021-02-19 13:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb2398a4e11a9580c6196472e58e7381 SHA-1: bf30df57f3a1849077ab0b2f5199b2f1a506c3db SHA-256: c771da29caec9d47c2d84e8dab8d3974b7363891a25fc0fbb9c6fa62fc4674ed
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'https://jacksth.ru/wix?keyword=the+backyardigans+best+clowns+in+town+images', which is likely a phishing lure. The document body is heavily obfuscated, but the presence of embedded URLs and the overall detection suggest it's designed to redirect users to malicious content, potentially a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=the+backyardigans+best+clowns+in+town+images
    • https://wufikaxom.weebly.com/uploads/1/3/4/8/134883002/namasakenu.pdf
    • https://static.s123-cdn-static.com/uploads/4391921/normal_5fffc6bedc60c.pdf
    • https://taxesewisozigif.weebly.com/uploads/1/3/5/3/135394589/8229289.pdf
    • https://static.s123-cdn-static.com/uploads/4478133/normal_5fc65f35eb2a8.pdf
    • http://wibifowomotab.iblogger.org/atziri_guide_poe.pdf
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fdeaed1cb513.pdf
    • https://gifivetusox.weebly.com/uploads/1/3/4/7/134736849/pawoxibexisom.pdf
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/22779b7c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bedegotix.epizy.com/zavoz.pdf
    • http://nomekerileme.epizy.com/69635165346.pdf
    • http://pobuwejugu.epizy.com/resume_templates_for_microsoft_word_2013.pdf
    • http://buwepuxaj.epizy.com/bacteria_vs_virus_worksheet.pdf
    • http://juxudawalugevop.epizy.com/google_sheets_query_select_cell_reference.pdf
    • https://s3.amazonaws.com/nuxomigo/lease_brokerage_agreement_form.pdf
    • http://mutifitiwexo.epizy.com/guide_signs_in_traffic.pdf
    • https://s3.amazonaws.com/xomepixo/harley_quinn_and_joker_hd_wallpaper.pdf
    • http://lowadof.epizy.com/puxabo.pdf
    • https://s3.amazonaws.com/lakujusitejojet/getijizowawajasukaloriw.pdf
    • http://wexalaz.epizy.com/62396825816.pdf
    • http://jisokewiw.epizy.com/fun_personality_test_questions_and_answers.pdf
    • http://fobajoruvibu.epizy.com/pafaresufe.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c9.bin
33c06c07149aa9a296e3df3af9f57bcc042b8b3cf5d2b924be4c6e76fb4326e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C9 5488 bytes
font_01_sfnt_off0000ea55.bin
b099fdfdbab8c18244db40d2d137bab053aecf9bf1682309715518aebbddd0dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA55 10132 bytes
font_02_sfnt_off00010d1e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 4324 bytes