Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb38fc0341828da…

MALICIOUS

PDF

89.8 KB Created: 2021-04-18 16:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d75d29fde87300d7f0a528589be1eec SHA-1: 72b83e16c5506d8f034b0351ea50afda7f6f0cbd SHA-256: fcb38fc0341828da60738b1c937dc244bffba96bcff51ddcc7f29050f43f3974
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=the+silver+chair+pdf
    • https://cdn.sqhk.co/nejajevafode/hdiiieu/lokowijekumolatenegejoput.pdf
    • https://static.s123-cdn-static.com/uploads/4464297/normal_6009056791cdd.pdf
    • https://cdn.sqhk.co/zoburawava/hijjxXu/53033242705.pdf
    • https://cdn.sqhk.co/busibelifiv/jgfkhji/93878079142.pdf
    • http://kaxiwex.iblogger.org/duxugugikosaxugib.pdf
    • http://bivozebavi.iblogger.org/94210489414.pdf
    • https://cdn-cms.f-static.net/uploads/4379733/normal_6038f4aba82a2.pdf
    • http://zekojotewakugag.mypressonline.com/cuando_te_pegas_en_el_codo_que_significa.pdf
    • http://musomojil.mywebcommunity.org/fusionner_des_pages.pdf
    • http://tokesuditetu.getenjoyment.net/operational_amplifiers_johan_huijsing.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zoromexemuzid/dojanituzaguxuzitavanow.pdf
    • https://uploads.strikinglycdn.com/files/f3c8f786-d3a5-45ad-95d1-19c9f4044aa0/54953537624.pdf
    • https://s3.amazonaws.com/jenisozazewubo/what_are_intervention_strategies_in_education.pdf
    • https://uploads.strikinglycdn.com/files/0a63053c-0c1d-4f0f-9ecd-f313ddf2c9ff/13975275098.pdf
    • http://zevabexidedu.rf.gd/jukuzamuzotaba.pdf
    • https://s3.amazonaws.com/pomaxa/rirofasek.pdf
    • https://uploads.strikinglycdn.com/files/096c7a5b-0060-407d-8a51-226566e82494/64468254120.pdf
    • https://s3.amazonaws.com/nuxulikiwab/bevapixafo.pdf
    • http://xomapagovujux.atwebpages.com/1st_grade_printable_worksheet.pdf
    • http://rujamodi.rf.gd/abnormal_psychology_17th_edition.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_off00011575.bin
b1251ffd9231dceef00d04a1a358a3a555ac687e1bdf4fc137b7926546677006
pdf-font-stream PDF embedded font (sfnt) at offset 0x11575 4744 bytes
font_01_sfnt_off000125a4.bin
622cdadc60ee998a1101b358193df8b93afdd0b6f1823675fbcf7f7c4168be26
pdf-font-stream PDF embedded font (sfnt) at offset 0x125A4 10996 bytes
font_02_sfnt_off00014a9b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9B 4324 bytes