Malicious PDF — malware analysis report

Static analysis result for SHA-256 349452c9a2f174ef…

MALICIOUS

PDF

83.0 KB Created: 2021-03-21 23:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 64f4d01cf44627bca0f52174d157c51d SHA-1: b24b4ceeff1edb800cdd4ee9702d2afc3cf83df8 SHA-256: 349452c9a2f174efc0feb580cba85d89a59afdddfe3606734dd36c3f5469cf6e
126 Risk Score

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 0.9993

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://crophysi.ru/wix?keyword=square+and+cube+roots+matching+worksheet+answers PDF link annotation
    • http://manamuposa.getenjoyment.net/alter_ego_5_vk.pdfIn PDF document text
    • http://lejidakoxinetog.mywebcommunity.org/data_analysis_using_stata_download.pdfIn PDF document text
    • http://wakekuluma.iblogger.org/98437033906.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/komerezajoxamenutanuduj.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/72356716309.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/lezuteg.pdfIn PDF document text
    • http://bewujasixi.mywebcommunity.org/94147813240.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/contraccion_isometrica_e_isotonica.pdfIn PDF document text
    • http://debesur.iblogger.org/hp_deskjet_3054_setup_wireless.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/nuxodefokovobodoti.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/85654067565.pdfIn PDF document text
    • http://lusuwivaw.medianewsonline.com/bepetonupine.pdfIn PDF document text
    • http://sozefavi.22web.org/kc_star_fishing_report_march_2019.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/larije.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/63524973812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_6d3858fa59a748beaac0ee197de9adf8.pdf?index=trueIn PDF document text
    • http://vegegaba.epizy.com/rujetopijosetujagaxa.pdfIn PDF document text
    • http://vuxepogi.atwebpages.com/bourdon_tube_pressure_gauge.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_b26fb9e78a8f48818fb821372aaa14c5.pdf?index=trueIn PDF document text
    • http://rilokew.rf.gd/zuxaragunigemitabexodi.pdfIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_4d43567e0c5444cfa6819b92ce62f765.pdf?index=trueIn PDF document text
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_fef239746fb34928945b1e1b2dada8e5.pdf?index=trueIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_4d9da262c41a4b01a8a7f4b45f80b836.pdf?index=trueIn PDF document text
    • http://xobebol.onlinewebshop.net/artritis_reumatoide_diagnostico_y_tratamiento.pdfIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_368f84e543a44ae2a253ec34fcf4123c.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_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 5848 bytes
SHA-256: 80f7d89937bbd75c2aea3ccb16bdbd5c1a0418c63930470c2bbbf2cb60073c3b
font_01_sfnt_off0001174f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174F 11628 bytes
SHA-256: 8d4cf89ae4ebd65ac3845d9016e535a0d066f993df63e4be616ae6037a93bbc5

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