Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74043c8254e3032…

MALICIOUS

PDF

71.5 KB Created: 2021-04-05 23:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5f736b0b7da884b34c08ee48beda2830 SHA-1: 8eb3ac011d7d3d2341a9726eaff2bdc21d558cf4 SHA-256: e74043c8254e303275296a90145b9a189e47e7f7db734a00ce05ae48cb983913
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This 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, which are likely used to host or redirect to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm for SEO manipulation or to distribute malware through numerous seemingly unrelated links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=crsi+manual+of+standard+practice+free+download PDF link annotation
    • http://fibawejifuma.22web.org/apache_server_latest_version_free.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/how_to_record_accrued_interest_on_income_statement.pdfIn PDF document text
    • http://getfreecreditreport.info/asus_eeebook_x205ta_driver_updateqxpm5.pdfIn PDF document text
    • http://atomyimperial.ru/35337078598nwpuo.pdfIn PDF document text
    • http://monoga.space/58540514285bjvas.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/allahabad_state_university_b_ed_syllabus_2020.pdfIn PDF document text
    • http://bimamoked.iblogger.org/algorithme_exercice.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/66186940636.pdfIn PDF document text
    • http://talakam.space/wepuzisuvukokaziwanaj5khro.pdfIn PDF document text
    • http://befigter.xyz/perodirofuduxajujenexaroa5g.pdfIn PDF document text
    • http://kexisugotiro.22web.org/arkansas_state_police_crash_reports_online.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/implement_quality_assurance_procedures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jepewolesuge.epizy.com/quartzcontext_mac.pdfIn PDF document text
    • http://besasasef.rf.gd/mizabumekukovesesuwonulo.pdfIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_e751380082864a9e9993e1348b68c034.pdf?index=trueIn PDF document text
    • http://fakipewoze.rf.gd/87900070994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb57d06-7930-4c19-88fd-fb9c115be918/smart_watch_camera_price.pdfIn PDF document text
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_cf7fc61d731e4d2f86c6954c83f40263.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36aea99-61ac-4abc-9f3b-f56bd1bbee5d/how_do_400_day_clocks_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d42fbc2-8005-46fb-889c-85de7476fb49/mowibekexupegobomof.pdfIn PDF document text
    • http://pafiposozow.rf.gd/naming_amines_worksheet_with_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 5296 bytes
SHA-256: 2e667128482e900fe61a2fdebae9688ba974bce4a2b67290f8d1b3105dc2babf
font_01_sfnt_off0000eb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB84 10796 bytes
SHA-256: 8e17f2a51b89b152cd0f3f983a72b82f5e1ee443c2fda19cded99d385d439e5b

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