Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b7bcfabcb55a30…

MALICIOUS

PDF

69.9 KB Created: 2021-02-10 05:33:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e2f9601f0bcaab530c3d1c11b0da42f0 SHA-1: 3a9f80ff55bf53c9c2a230d73e1638577a7a2f7c SHA-256: 98b7bcfabcb55a30bdf41e0837ffabb29b8001c7164a4f7b75c7736e9b3fad6e
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a secondary payload or conduct further phishing activities. The document body, though heavily obfuscated, suggests a lure related to 'caravan house information'.

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://seumenha.ru/wb?keyword=caravan%20house%20information PDF link annotation
    • http://cyberghost.store/60792206098b3miv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_60233524ab2f0.pdfIn PDF document text
    • http://afracheat7.xyz/kwame_nkrumah_neo_colonialismf4rrm.pdfIn PDF document text
    • http://logemopi.22web.org/87328188155.pdfIn PDF document text
    • http://instahelpforbusiness.com/consider_the_frame_shown_in_figurejrxoh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/compassion_hymn_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/aberdeen_performing_arts_panto_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/kidinoketubibivojoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/toziretanaloxigewav.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/rajala.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/grade_9_math_test_with_answers.pdfIn PDF document text
    • http://nupopejif.epizy.com/manualidades_de_papel_faciles_y_bonitas.pdfIn PDF document text
    • http://perowal.rf.gd/service_marketing_concepts_strategies_and_cases.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/brtc_full_form.pdfIn PDF document text
    • http://tagutibebik.rf.gd/xufabaxoxajalunakitiz.pdfIn PDF document text
    • http://vufebadavoga.epizy.com/guided_transmission_media_in_computer_networks_ppt.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E2 4940 bytes
SHA-256: a1a4fac847e5ebf28493d5a746eaf24b7a04a98507ca68bda97869b3b3206958
font_01_sfnt_off0000e78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78B 10336 bytes
SHA-256: 4404dfbc91e3418e7b4cb98ea901cf4e4589717792c10cc3f3cfefadf72c8659

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