Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a88db5b8bf2f50…

MALICIOUS

PDF

72.3 KB Created: 2021-03-24 23:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b547ddf1347d07ff8546981937e6a66a SHA-1: 7740c2a186bb41e044e7af05245bb9c9c4d1f8ad SHA-256: 49a88db5b8bf2f50d373cd2efb0f2060006b7196ab77336ecac3e3197eb99a24
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 trojan payload. The embedded URL, https://soxebez.ru/award?keyword=treasures+grammar+practice+book+grade+4+pdf, is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or redirect users to malicious sites, aligning with common phishing tactics.

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://soxebez.ru/award?keyword=treasures+grammar+practice+book+grade+4+pdf
    • https://cdn-cms.f-static.net/uploads/4387226/normal_60258ab2d8c14.pdf
    • https://cdn.sqhk.co/kagawupatow/dhj3xQ2/b._ed_me_epc_ka_full_form.pdf
    • http://zavupefedeba.22web.org/17828842566.pdf
    • https://cdn.sqhk.co/viwukepato/d3Jijkp/antivirus_gratis_windows_10.pdf
    • https://cdn-cms.f-static.net/uploads/4476282/normal_602f24b0658b4.pdf
    • http://lodujenoxo.iblogger.org/vb._net_2010_software_full_version.pdf
    • https://cdn-cms.f-static.net/uploads/4450138/normal_603d087d1bd32.pdf
    • https://cdn.sqhk.co/wefopijupe/87EYjib/bufatotesojesarebuwame.pdf
    • https://cdn.sqhk.co/detokelixipi/jz38YGq/31063465946.pdf
    • http://pedazupemadid.22web.org/90744964721.pdf
    • https://cdn.sqhk.co/sesudegaruta/jhighdl/difference_between_metaphysics_and_epistemology_in_philosophy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dabevejef.rf.gd/80475354916.pdf
    • http://turegipamikum.epizy.com/definitions_of_history_by_different_authors.pdf
    • https://s3.amazonaws.com/litunux/how_to_program_spectrum_remote_to_control_samsung_soundbar.pdf
    • http://jopewadakos.epizy.com/digiveroxupokedovatubabik.pdf
    • http://xolemobubusosi.rf.gd/chlamydia_treatment_guidelines_uk.pdf
    • https://s3.amazonaws.com/jagux/tubojabalefulomutirupuwaz.pdf
    • https://s3.amazonaws.com/nitizobuv/mewinitazu.pdf
    • http://tozemuj.rf.gd/gasamer.pdf
    • http://kukejisagev.epizy.com/patient_data_flow_sheet.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_off0000cd77.bin
aef2afe16534ae2a2fffbe61fd502ee1dcfd9cff8004b9a1bf03d5f7a7e2437d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD77 5460 bytes
font_01_sfnt_off0000e00c.bin
50e8b6891da1bd170c10b40ad0b4e3e82dedb733cc309d36df59235bd47b77f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 11020 bytes
font_02_sfnt_off0001058d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 4324 bytes