Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39d0eb458800f26…

MALICIOUS

PDF

76.4 KB Created: 2021-03-06 08:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5b9a9368430213153af6da158daa9675 SHA-1: bd090387d35b6dc84ec70ba6e0044582ffab734a SHA-256: b39d0eb458800f26638d54e6b0f713ea356c2c083967c05f1208aa581365ffb4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs pointing to disposable hosting domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the classification as a link farm indicate an attempt to distribute malware or conduct phishing operations.

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://jumiwimov.ru/award?keyword=bass+tracker+pontoon+boats+for+sale PDF link annotation
    • https://cdn.sqhk.co/kewukapugino/RPwiaib/perfect_kick_2_apk_indir.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/jW2geCa/fedekawuvuziraxexiruwevub.pdfIn PDF document text
    • https://cdn.sqhk.co/kisoxukapab/cigjbmk/9517368477.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/icnhdhF/blood_pressure_medications_names.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/2652731608.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/ig85ric/wixoxavitosunelowigor.pdfIn PDF document text
    • http://ogranicbio.fun/sub_zero_refrig_and_freezer5sas4.pdfIn PDF document text
    • http://pubgucbayim.com/moonshades_lever_puzzleqtqjr.pdfIn PDF document text
    • http://morj.space/xilegaduvau8e1c.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/zedabibedepi.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/iomgsgj/high_pass_filter_transfer_function_matlab.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/how_to_metric_units_of_measurement.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/54hjvii/comic_book_reader_app_ios_free.pdfIn PDF document text
    • http://damvglaz2.xyz/viper_alarm_remote_battery_replacementycsjo.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/fijozovexavakupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_33b4cf893f1d47b780faac0cc0856250.pdf?index=trueIn PDF document text
    • http://wirudulobaga.epizy.com/23356101629.pdfIn PDF document text
    • http://jilejulo.epizy.com/kapawibikofawalopaxamufex.pdfIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_8ce49509504141ba9cf12b2d2470b625.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_913c268a627c48c5a29489ec7b5a4700.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_4f02d1fbbfbe4e01b9f48bd2e97c527b.pdf?index=trueIn PDF document text
    • http://tovanafinavo.rf.gd/6789185353.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_off0000ef1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 5260 bytes
SHA-256: ec669690119eb62548fa4e966e4790e13ca207e3265852bc528bfe95e8702a1c
font_01_sfnt_off0001010f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010F 10328 bytes
SHA-256: 8ec02fd80868d23dd8798454c3bcf3b9b84bb6c8bda6f920088b2bf0d9a85939

Open this report in the interactive analyzer, or submit your own file for analysis.