Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f49eec1a5114ac2…

MALICIOUS

PDF

179.1 KB Created: 2021-04-04 06:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 61de349c5a9b3009872b492329d213f1 SHA-1: 13fc5904f5f7801df6a116eb70d335b4588b9b6c SHA-256: 6f49eec1a5114ac2f948aa8f619e906321f67759c53cdd12833a095b64b0aede
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability to execute code. It contains numerous embedded URLs, with one specifically pointing to a link farm designed to redirect users to potentially malicious content, suggesting a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic strongly support a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://jottigo.ru/wix?keyword=hildreth+elementary+school+staff PDF link annotation
    • https://pepolugevukur.weebly.com/uploads/1/3/2/7/132740925/kasekoripowaguliruwe.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/gc2gckx/xopab.pdfIn PDF document text
    • http://koreatop.ru/navenitisixorogimu3ojkd.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/aueBjVZ/24219065295.pdfIn PDF document text
    • http://manamuketamas.22web.org/the_republic_of_tea_mandalorian_the_child_green_tea.pdfIn PDF document text
    • http://nokirixako.iblogger.org/what_is_on_the_2_for_5_menu_at_arbys.pdfIn PDF document text
    • http://norasidifonilov.22web.org/ap_transport_llr_test_questions_in_telugu.pdfIn PDF document text
    • http://tomogorman.com/abc_report_horseslqjar.pdfIn PDF document text
    • http://soldonlittleton.com/what_is_the_arkenstone638st.pdfIn PDF document text
    • http://dronextactical.xyz/dununekitlzb7.pdfIn PDF document text
    • https://cdn.sqhk.co/xezexasag/Yp0rf9n/12557106846.pdfIn PDF document text
    • https://sugelazo.weebly.com/uploads/1/3/4/7/134767002/laxirikulirafedabuf.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/3aPzCWp/kontra_k_freunde_lyrics.pdfIn PDF document text
    • http://dulexip.22web.org/38616307175.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/65986862599rgpdt.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/ajgChgx/world_war_1_brief_history.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaduneraxoden.rf.gd/zewovuxivejikotubekul.pdfIn PDF document text
    • http://filusexiwagip.epizy.com/defab.pdfIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_832696f35478493fa88e51c958f48a8e.pdf?index=trueIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_d8c88e536d04472fa07c4da460543d96.pdf?index=trueIn PDF document text
    • http://nizamazibenu.rf.gd/godigitibatamaguxevidu.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_44fc756d4dee4b99b2fb569e7cc39c41.pdf?index=trueIn PDF document text
    • http://dumatefofexulen.epizy.com/what_are_the_four_stages_of_mitosis_cells.pdfIn PDF document text
    • http://giduzorim.epizy.com/bag_design_by_fashionary.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_a1f66a463f2d4e4499de52638912ddde.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_off000286a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x286A5 5324 bytes
SHA-256: 9ce674bcd7b00ba99ecc226698247f92090e9956d907a113b601fe3fb2b7bebd
font_01_sfnt_off00029896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29896 11116 bytes
SHA-256: f5750794b903a40ff2eceaf54f43aa0319148462ec82163a9aa7a09cec1fd6e5

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