Malicious PDF — malware analysis report

Static analysis result for SHA-256 44114e6f6e20fdb9…

MALICIOUS

PDF

72.8 KB Created: 2021-03-16 16:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87705680104df339dbbbd322f5057e57 SHA-1: 691488d3599f9ea8ed9b533db53e26c20a8d1f15 SHA-256: 44114e6f6e20fdb96d22f1c8a1f54775ede398942ca54885931c9666fff3b80d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or phish for credentials.

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://nipisod.ru/strik?utm_term=a+brief+history+of+the+romans+boatwright+pdf
    • http://kadipesiwixovil.22web.org/vozobanapopomorotariter.pdf
    • http://vevaxogejaz.scienceontheweb.net/how_to_use_the_super_snark_tuner.pdf
    • http://warixedivukinat.mygamesonline.org/how_do_you_calculate_geometric_mean_growth_rate.pdf
    • https://cdn-cms.f-static.net/uploads/4490375/normal_6030e78fd4501.pdf
    • https://cdn-cms.f-static.net/uploads/4467979/normal_60271d0514d8d.pdf
    • https://static.s123-cdn-static.com/uploads/4368251/normal_5fee2f844efc3.pdf
    • http://gta-msk.ru/92812789610y83bz.pdf
    • http://uscovidcharts.com/keystone_ski_reportyygnm.pdf
    • http://antileqphh.site/2015_hyundai_sonata_shop_manualse3ih.pdf
    • http://raifaisentgo.online/rorinivofozex92inp.pdf
    • https://cdn-cms.f-static.net/uploads/4489402/normal_601b65318eec6.pdf
    • http://subfamjtii.site/24683204429umcwm.pdf
    • http://mujudesuxiropa.sportsontheweb.net/the_norton_anthology_of_theory_and_criticism_3rd_edition_ebook.pdf
    • https://static.s123-cdn-static.com/uploads/4404528/normal_5fe3a84e78be9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://namepafubi.atwebpages.com/46371307828.pdf
    • http://novegiw.rf.gd/craftsman_lawn_mower_briggs_and_stratton_625_series_manual.pdf
    • https://s3.amazonaws.com/kovozenamofox/google_sheets_if_statement_in_query.pdf
    • https://s3.amazonaws.com/jazuravazaguz/aprilaire_600_manual_installation.pdf
    • http://pigutun.myartsonline.com/what_are_the_components_of_job_design.pdf
    • http://mevediruzorapaz.rf.gd/information_about_madhya_pradesh_culture.pdf
    • https://s3.amazonaws.com/kukupunopedon/palenuj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb4.bin
6096706eae5f535c256c80849526c31344251ff6e43a6275db7a7c52b413cf62
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB4 5748 bytes
font_01_sfnt_off0000f134.bin
4223aec4f4e6041c1c41f3704e5d8b45d383d2850bc0ff659e3806f84b4c7b28
pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 10684 bytes