Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec00f65e4bd2222…

MALICIOUS

PDF

74.1 KB Created: 2021-03-31 10:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c67e808ca40ec59d2d6c3dfc8cae2d53 SHA-1: 56a47b4aec3ff064db2d10ff4f5c1af9d706cb77 SHA-256: eec00f65e4bd2222706b012e80cdfa4c6c9a228431331425bf1dbd1b1bb02bb4
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 0.9991

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://nipisod.ru/award?keyword=the+history+book+dk+pdf+download PDF link annotation
    • http://gifinekinurubuk.iblogger.org/sikolofuliba.pdfIn PDF document text
    • http://airbin.top/wogodubaigyso.pdfIn PDF document text
    • http://koreanluxe.com/algorithm_manual4gn1p.pdfIn PDF document text
    • http://zilitimo.getenjoyment.net/anxiolytic_and_hypnotic_drugs.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/amana_room_air_conditioner_manual.pdfIn PDF document text
    • http://rorogudadusosej.getenjoyment.net/28059495521.pdfIn PDF document text
    • http://barakerefexile.iblogger.org/bovajo.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/abdominal_bracing_exercises.pdfIn PDF document text
    • http://amorexpo.com/zimajovusoreninudabeoiwsa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowujobosega.rf.gd/ay_ft_fid_q.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22251f32-741f-42e9-877b-240554571480/common_core_math_worksheets_first_grade.pdfIn PDF document text
    • http://zugotival.epizy.com/ancient_adjective_form.pdfIn PDF document text
    • http://zixoridepub.rf.gd/2127189664.pdfIn PDF document text
    • http://fobajoruvibu.epizy.com/descendants_1_script.pdfIn PDF document text
    • http://sunefosopibe.rf.gd/11912021577.pdfIn PDF document text
    • http://mofagadelebedos.rf.gd/ffxiv_fashion_report_august_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88458dc1-a45a-451b-98be-7489e935f8df/what_type_of_reaction_is_so3h2oh2so4.pdfIn PDF document text
    • http://xojaxalevigob.epizy.com/first_day_of_school_2020_florida_hillsborough_county.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d1dcd7-950e-4b8f-9ca4-2bc463c69655/luwitu.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/60918265237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae88522-cdc0-4c46-9993-83f313f675d3/87114618017.pdfIn PDF document text
    • http://benepiro.rf.gd/friendly_reminder_template_for_payment.pdfIn PDF document text
    • http://xefokezutuvij.epizy.com/85537629155.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/60435185163.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_off0000df1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 5476 bytes
SHA-256: d10505876f2971748bcd70f4e6b8485eba13e81b6b4ab2dbfa07be9dde0c5cb8
font_01_sfnt_off0000f1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C4 11988 bytes
SHA-256: 42ec6a6d55ac9c54e7e6a574e8fcea4774258972eb7ad12f414c9c5209f0cae5

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