Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67b83c6a4e4e8e6…

MALICIOUS

PDF

84.0 KB Created: 2021-02-11 14:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 823e393c904a85f452c78e409aadfcf1 SHA-1: b2a811f757d9f3360901ac33238b1f4a42cf3af5 SHA-256: e67b83c6a4e4e8e607e8effbee7dd58f47cecd42849947a4585771d86e71dba7
126 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 numerous embedded URLs, many pointing to disposable domains and link farms, indicating a strong intent to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=jason+burkett+child PDF link annotation
    • http://pasendapp.online/gidukelifebuxurikulfq.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/NbTYjij/tamil_stylish_fonts_download_for_android.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/appcake_ios_1262vi9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_6018a4c4d7dd0.pdfIn PDF document text
    • http://zeropium.com/2101357179hnqws.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/6gighgc/zavuvaromizabevupar.pdfIn PDF document text
    • https://wesoxuzepa.weebly.com/uploads/1/3/4/3/134372623/webutil_mazagiwojel.pdfIn PDF document text
    • http://gufutaca6.xyz/101792504188jc8d.pdfIn PDF document text
    • https://dixatuwep.weebly.com/uploads/1/3/5/3/135398053/1e458dadbe7136.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe1d09e324dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_6007e05ad04ca.pdfIn PDF document text
    • https://xasizati.weebly.com/uploads/1/3/5/9/135978204/xoboboladafape.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/dgegda5/vinatolukanobotowijubi.pdfIn PDF document text
    • http://okstore.info/gonna_fly_now_flute_sheet_music69svj.pdfIn PDF document text
    • https://cdn.sqhk.co/pawapoma/cH7jjjc/tomazapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447271/normal_6004f65fae46d.pdfIn PDF document text
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/e359a11ffc417dc.pdfIn PDF document text
    • http://clipshd.design/toripamedusb85b.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/gFhbifx/run_santa_run_play_online.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/meludav/twenty_one_pilots_blurryface_live.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/best_s_for_movies_on_firestick.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/best_shop_vac_2019_consumer_reports.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_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 5220 bytes
SHA-256: 164215cea93effaee7904c7c7242539cddc234b7dded47fc3129dc237dc656aa
font_01_sfnt_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 13368 bytes
SHA-256: 5ba2597ec5e10f6ae84a77aa8f74ea715cd13a360d2b2eead4b423b980b22e0d

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