Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc97a00bbe1c3f87…

MALICIOUS

PDF

70.1 KB Created: 2021-03-18 13:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 389d4cac027ceefe505d2f30bc79d710 SHA-1: 5a589ee137659038be2468181d53a289e7047440 SHA-256: fc97a00bbe1c3f87ab89cfc04d508073bf42ca2f3cbf015c0b00392a3d6b76b5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/aws?utm_term=why+is+my+vizio+blurry PDF link annotation
    • http://latencfsrt.space/32862213309zgxs5.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/zonaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_5fccee88d565d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_602108ddc9f11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_601ed2b1467ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fe84f62cd269.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480383/normal_6002f13ce2ae8.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/98580516124bgbro.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/NVfjjN9/gestion_de_la_pme_debouche.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/hDRdjdf/crossfit_games_2020_final_event_12.pdfIn PDF document text
    • http://nonly.xyz/instrumental_techniques_for_analytical_chemistryi0c4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452861/normal_600a4c6773b92.pdfIn PDF document text
    • http://potenciy.xyz/16784000883jvkm4.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/flgfhfH/14221540557.pdfIn PDF document text
    • http://olx-delivery.cc/fizaku1nvmi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_60476eb9bf7cf.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/dhgLjaT/10113615263.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/how_to_measure_volume_of_cylindrical_tank.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/bubeto/how_often_can_you_day_trade_on_robinhood.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/85746844263.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/channa_mereya_full_movie_720p_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/what_to_do_blocked_milk_duct.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/nozanilefopedekadanuxire.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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 5080 bytes
SHA-256: 5ef163ef5d3f46fa1c6e42397eb84b24cc6a7a8a608ba44c3be34fe2b235df40
font_01_sfnt_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 10876 bytes
SHA-256: fd41ab837e750d304e067f0b7a116ee76d5e316add9a8c885c874701c18e3458

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