Malicious PDF — malware analysis report

Static analysis result for SHA-256 b420bee4141b03b0…

MALICIOUS

PDF

77.1 KB Created: 2021-03-31 03:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e741f9d608905c85bdc703179d8bde1 SHA-1: 84eb3028db0b831c94d48a33f6a4f7f08fe120e5 SHA-256: b420bee4141b03b0a57d64390a7f45e602a7c40744a5625b82973a957e2df2e4
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 0.9996

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://seumenha.ru/award?keyword=motor+hp+to+amps+chart+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5fe0ba343a51d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_602ca6a156d2d.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/macchi_materiales_dentales_4ta_edicion_gratis.pdfIn PDF document text
    • http://bagesopabiwub.scienceontheweb.net/how_to_light_up_electric_fireplace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450351/normal_6031f9fb8c15d.pdfIn PDF document text
    • http://bomawowaziwan.iblogger.org/54235326698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499319/normal_5fc9eb19819b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489251/normal_5ff782b4c127a.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/23812781353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367627/normal_6002d7ccd0c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_605c44365b5aa.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/what_were_given_emphasis_during_the_golden_age_of_greek_sculpture_brainly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35fe7a1d-3f0f-4f60-9e01-387e22905c4f/jiwolalesad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376a7d1f-0484-49a2-bd93-fac910e09493/gofotiwelepezafituwuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af88f21-30b8-4e84-932e-66bdeb8f9356/what_is_the_main_theme_of_the_stranger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebafbd1f-228c-4cdd-a206-c876d0660e2a/rosemarys_baby_minnie_castevet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e90aab-95c8-4ca1-b04d-2fb1a8b13863/ged_practice_test_2018.pdfIn PDF document text
    • http://luxusuriva.epizy.com/3._6_vector_tangente_normal_y_binormal.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/dabazuvopodajoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48363351-f237-4e0b-ae84-1a933b2e9434/que_es_un_mapa_de_riesgo.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/acuerdo_de_union_civil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581f5c10-1e91-43ae-bc87-fa9ffd62642e/jet_jj-6csx_helical.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_off0000edd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD9 5368 bytes
SHA-256: f86657e2971ec0dfe6a03c562159cde2694771a2ffba1b6956861a70117055d3
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 11528 bytes
SHA-256: 3e29e2796cfa57147d86c1c0d6ba7f9bb89e09cd05210597e5e07e94bf1638e3

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