Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e2497f67198d03…

MALICIOUS

PDF

81.9 KB Created: 2021-03-06 23:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ab5be145e16df02a4d7a9865f781df0c SHA-1: 713d0a4c4378fbab9b223c0fad5cb90b08c35b21 SHA-256: 58e2497f67198d0341ee38c71d77483e2eb4dbdc0e902f16c31366e13f771154
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a redirector to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users by directing them to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=powerful+positive+energy+quotes In PDF document text
    • https://zuxolizaf.weebly.com/uploads/1/3/2/7/132740519/d4cd43a9.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/ie4CieM/fulojejumojinunizuruja.pdfIn PDF document text
    • http://nuxirofa.iblogger.org/how_to_show_cracked_passwords_in_john_the_ripper.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/dedekujajolemapes.pdfIn PDF document text
    • http://cherrypimp.online/how_to_make_bat_stickers_at_home_easyqpu8z.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/Rijibx5/sotofobufidupogiveki.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/icgiOYS/police_car_auctions_mn.pdfIn PDF document text
    • https://cdn.sqhk.co/pivogokixej/hfQidqS/97236710264.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/mogen.pdfIn PDF document text
    • http://help-bluebadgecenter.com/let_there_be_peace_on_earth_sheet_musicgr5kr.pdfIn PDF document text
    • http://bhd-management.space/photography_a_cultural_historyw0hlg.pdfIn PDF document text
    • http://hangzhoumetal.ru/bigo_live_apk_pcq1wsb.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/lobekowelupuvedid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://motozotofo.rf.gd/analog_clock_with_second_hand_widget_android.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/23089852968.pdfIn PDF document text
    • http://gijawiravutul.epizy.com/rigomojedosoralu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed9883e-5a0f-4a22-b8b4-ced019dbd7b8/maytag_gemini_double_oven_gas_range_broiler_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe352ca3-8c12-4071-b860-abfd3f712583/lixula.pdfIn PDF document text
    • http://wekujugom.epizy.com/41158752057.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_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 5240 bytes
SHA-256: 17acbdeb4ae73fecd25a97645fc0a957c1b6bff524fb62dd1ef016c6cf4abfe4
font_01_sfnt_off0001160a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160A 10704 bytes
SHA-256: 87f853a218ff69d87755942345f2eb4ee55668e818a79481e334fab8cf0869b0

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