Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9b2f3bb26be235…

MALICIOUS

PDF

83.4 KB Created: 2021-02-15 18:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4097574355cdb0f9661d5910b324e550 SHA-1: d1d92fe704262d1882f8a3301e1d0739224f50a0 SHA-256: 4c9b2f3bb26be23547cc1b996745625efbd9b2304b73a03cd866d635392ab1fa
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded document body, though heavily obfuscated, contains text related to 'Pinacate beetle in my house' and application metadata, suggesting a lure. The primary IOC is the external URL https://druttle.ru/wix?keyword=pinacate+beetle+in+my+house, which is likely used to redirect the user to a phishing or malware distribution site.

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://druttle.ru/wix?keyword=pinacate+beetle+in+my+house
    • http://b4shop.icu/bareilly_college_form_last_dateyxj0u.pdf
    • https://static.s123-cdn-static.com/uploads/4365634/normal_600759dc3c2c3.pdf
    • https://cdn.sqhk.co/kixobaza/0vhffii/cartoon_wars_gamevil.pdf
    • https://cdn.sqhk.co/sopaluwokaja/B3jbfDc/jusewobi.pdf
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5ff3509113ec9.pdf
    • http://slamelina.website/wegokizarupebav71r9.pdf
    • https://cdn.sqhk.co/sepagumal/hcjdUjg/daxuxisan.pdf
    • https://cdn-cms.f-static.net/uploads/4502175/normal_6013dd084e330.pdf
    • http://reduslimitalia.site/beyblade_burst_app_apk_hereqgi8h.pdf
    • http://sunobalizumona.iblogger.org/materi_apbn_dan_apbd.pdf
    • https://static.s123-cdn-static.com/uploads/4413239/normal_5ff7bb835d2f1.pdf
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/8205b.pdf
    • https://cdn.sqhk.co/zukasedu/0xHffii/27997231367.pdf
    • http://twoup-viktoria.online/ziregozunamawezoluraz1vayz.pdf
    • https://cdn.sqhk.co/bafaluminowi/qhijggh/lumuwuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fizifar.epizy.com/crystal_report_viewer_toolbar.pdf
    • https://s3.amazonaws.com/mavixu/61939679384.pdf
    • https://s3.amazonaws.com/divexikav/diary_entry_template_for_students.pdf
    • https://s3.amazonaws.com/farezelof/linab.pdf
    • http://zukanimi.epizy.com/51128173926.pdf
    • http://luremugaxufarup.epizy.com/fftoolbox_fantasy_football_cheat_sheet.pdf
    • https://s3.amazonaws.com/lemerisinivum/mepufipilepefetotozate.pdf
    • http://en.wikipedia.org/wiki/Pinacate_beetle
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b0.bin
698cc72c8cac93e7e009aeda2f2a921d90163ae9669630a040ef4996fa8ea39e
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B0 5188 bytes
font_01_sfnt_off00011b34.bin
ba60636953a770d5c94ae2cb1c392d956f3907d5f5ddbc416191c0e43ee3d06f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B34 10744 bytes