Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd28d99870a00edf…

MALICIOUS

PDF

72.0 KB Created: 2021-03-27 14:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e8262d98dc92a810743f1a206e3aaa6d SHA-1: 54c226e87376a7b1c28a7bdbeef826579f0e0c28 SHA-256: fd28d99870a00edf510a969c7b5b3a1cbc261e692429437951c97af89b98d69b
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-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://seumenha.ru/strik?utm_term=the+secret+garden+2020 PDF link annotation
    • http://bomisedoxu.mywebcommunity.org/malayala_manorama_e_weekly.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/0ugRici/tidisobebideru.pdfIn PDF document text
    • http://bavunexebiri.iblogger.org/telemecanique_drives_altivar_11_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_603e68b4c5227.pdfIn PDF document text
    • https://cdn.sqhk.co/zosikoto/ghTDigZ/how_to_iron_a_polyester_polo_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/P9ihhaB/deriralob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_602e48e41763f.pdfIn PDF document text
    • http://palupalukagu.mygamesonline.org/roraduxugowusu.pdfIn PDF document text
    • http://wigageturuv.mywebcommunity.org/76107061714.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/hhfjjDd/92844973129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_5fd65273d8ae5.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/delonghi_magnifica_s_coffee_machine_parts.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/3801906298.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/dewalt_dw402_parts_breakdown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_603f3312c56ef.pdfIn PDF document text
    • https://cdn.sqhk.co/tekunipifob/6J1gelx/59661609256.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/vijutarufuwus.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/introduccion_a_la_arquitectura_de_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_600a7782d705a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5fe89ed64a50c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_6054226d067b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedovafimolodem.epizy.com/29353961686.pdfIn PDF document text
    • http://wugetad.myartsonline.com/c._v_pattern.pdfIn PDF document text
    • http://getutefuma.rf.gd/habits_of_my_heart_lyrics_traduction.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_off0000ded6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED6 5392 bytes
SHA-256: e5e5c3a2710763410e1439cb2b3952b6f3ba38f19b916ee7f3e23eb08028fe90
font_01_sfnt_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 10012 bytes
SHA-256: b928f21aa2e8f2e3220d7a4f0299965aa80bbcdb274a2ca9338cfef722dc20c9

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