Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5b718e0d04c649…

MALICIOUS

PDF

78.1 KB Created: 2021-03-24 09:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb73898ef42b614ad90d1620851f2bbd SHA-1: df68f0edc16ac9929560dda90c3cbd4ddd304f73 SHA-256: 4f5b718e0d04c6496c21233a54ad3f7dfa4838aff06001b3f3c1a99bebd4af94
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojanized document. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though partially corrupted, suggests a lure related to learning English months, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=meses+del+a%25C3%25B1o+en+ingles
    • http://rinobozawizuvew.iblogger.org/99072994792.pdf
    • http://salukapebuke.iblogger.org/65769000525.pdf
    • https://cdn.sqhk.co/bowevuva/jjgsveR/smith_s_marketplace_west_jordan_jobs.pdf
    • https://palisuxil.weebly.com/uploads/1/3/1/0/131071308/bepuneri.pdf
    • https://cdn.sqhk.co/fujotojaxob/UqjcIHW/nurojirejetu.pdf
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/bozitoxobudugogi.pdf
    • http://sakivometo.medianewsonline.com/panduan_penyusunan_dokumen_akreditasi_rumah_sakit.pdf
    • https://cdn.sqhk.co/ribobujir/dVAjclJ/lovely_pets_grooming.pdf
    • https://cdn.sqhk.co/dewavasese/ry8vxhh/cute_ice_bear_wallpapers.pdf
    • https://dasirexifavud.weebly.com/uploads/1/3/5/3/135320576/timamuvojadozivixan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pulavokaxe/jonulezawexekeva.pdf
    • http://sofibimibojas.myartsonline.com/zitivituw.pdf
    • http://fisiroxeriwew.rf.gd/10707027489.pdf
    • http://rufedum.rf.gd/portugus_sem_fronteiras.pdf
    • http://mideravedikow.rf.gd/nadupinegatelesebosot.pdf
    • https://s3.amazonaws.com/mubefula/bootstrap_center_form_in_middle_of_page.pdf
    • http://kulilemol.epizy.com/nototoparadomajigebujuni.pdf
    • http://xubeveg.epizy.com/spreadsheet_package.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_off0000e3e9.bin
f7e7b017445adefdeccc2ca4f529ea2a5246e10e2072feddbfc36308b48fcb1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E9 4820 bytes
font_01_sfnt_off0000f413.bin
3e191023573f78524ab07bdee703c10f7f64b18cefdf310c028fa11bb60db790
pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 12076 bytes
font_02_sfnt_off00011b77.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B77 4324 bytes