Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47e2b4808cc91dd…

MALICIOUS

PDF

130.9 KB Created: 2021-04-03 05:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 211219a4a3d0206f01828002683b1a8d SHA-1: d676aa290ae8a4fffd5a582018cd97c750e75065 SHA-256: f47e2b4808cc91dd8fbdb2e7d84e56f411064187f254c3adaec5796c31db8030
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=daily+tasks+app+android PDF link annotation
    • https://cdn.sqhk.co/soziwariru/qRiiLh0/note_taking_methods_for_middle_schoolers.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/agjNIie/survival_rate_of_lung_cancer_treatment.pdfIn PDF document text
    • https://cdn.sqhk.co/vatopibar/9jhujac/xerakafidat.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/icTvjit/60451961512.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/eohfVgj/army_pt_preparation_drill_acronym.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/Jicl7o1/jumagofapujutenej.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/hjjhiJ9/bmx_boy_unblocked.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/ziwexejowepovugeke.pdfIn PDF document text
    • http://pefumaviba.22web.org/49824032475.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/dRqjhUf/mivibuxejamoberikinawol.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/hd5ibhf/gacha_life_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/jgE3pxn/czasy_teraniejsze_i_przesze_angielski_wiczenia.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/airtel_dth_ala_carte_channel_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_c489c5cec8e64492960d2e77c667b5ba.pdf?index=trueIn PDF document text
    • http://mojozore.myartsonline.com/putigifitapib.pdfIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/dutejokezabuzorelovi.pdfIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_95bf0df31f3a444584bb61f014e69339.pdf?index=trueIn PDF document text
    • http://nufewaruxemo.epizy.com/kao_corporation_annual_report.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_23a70cc1255c45be801eb84ea9da9517.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_d86c25335c5c4222809c5426f6dde974.pdf?index=trueIn 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_off0001c6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6A0 5120 bytes
SHA-256: 0d9da51c64be7254d9e27703bffbd43524e2057254c4ac295897418d8a0e1c1b
font_01_sfnt_off0001d82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D82B 11340 bytes
SHA-256: eb10bc40b023ce9cc2fb33dba9e0355d0785eebebda3adef14ed36d94a7abd33

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