Malicious PDF — malware analysis report

Static analysis result for SHA-256 246054b43de19fc1…

MALICIOUS

PDF

77.1 KB Created: 2021-02-18 03:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a127da833f52fac86ee241739d216e07 SHA-1: d741341620006e9b53934d5c5cafa70b860d9e6d SHA-256: 246054b43de19fc1fd86ac72c1bfad2cb48d97f0acdb54705eed9ce8f897201b
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous links to external websites, many of which are flagged as potentially malicious or part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs suggest an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=examples+of+classes+chordata PDF link annotation
    • http://ewwe.space/resident_evil_4_ppsspp_zip4qfwy.pdfIn PDF document text
    • http://emirofficialzm.com/zudogetinivixabidinerirobsgrtj.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/7614341832a.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/0mimvcs/fl_commando_d_day_hack_apk_download.pdfIn PDF document text
    • http://websporizle4.com/70799207628ceb2r.pdfIn PDF document text
    • http://vodoroding.info/wavugamoribuwadilenaw2ul.pdfIn PDF document text
    • http://nonretloli.site/advantages_of_critical_path_analysis94z27.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hgjbihP/hill_climb_racing_bike_highway.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/xedemolar.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/wuniku/39640233788.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/99781369256.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/impossible_quiz_answers_q41.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/best_benchmark_test_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/broadcast_receiver_not_working_in_android_pie.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 5420 bytes
SHA-256: 282acbf05a716e4c04114a27fd16996bd70f4c04f84e66116a614d25246509d6
font_01_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 10476 bytes
SHA-256: 79636f1728ac5b1ef937dce960e5a8ce666c1fcfd258089e6d1c4380f70139eb
font_02_sfnt_off00011180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11180 16236 bytes
SHA-256: 846287c0d03473eae536dc7fdef5dac4e3be9582c03d9759db29d0495d7fdce3

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