Malicious PDF — malware analysis report

Static analysis result for SHA-256 df427c9c7f32fce8…

MALICIOUS

PDF

72.9 KB Created: 2021-02-28 03:30:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aeb853f36174b005871227f749785e37 SHA-1: ea4e8b430c81586b1563bd89df55ce6cb6a5fca3 SHA-256: df427c9c7f32fce8649e3447cb6ddfaf000a951d58b95f6be4a0f32167b5a2a9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. 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
  • 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/strik?utm_term=how+to+program+a+sony+rm-vz320+remote+control In PDF document text
    • http://jekenufakewe.mypressonline.com/52036916623.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/hcOUpjg/top_50_wwe_finishers_on_trampoline.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387061/normal_5ff189bdc01dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501233/normal_603612ae273d2.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/UQQvNNK/builder_for_minecraft_pe_free_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/iauxhmd/disney_battle_heroes_tier_list_august_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_601ed5121b41e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377407/normal_5fca7e3d749cc.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/jupujuza.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/0bigico/vexalafufuvesowutaruwe.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/50671208011.pdfIn PDF document text
    • http://nesobaka7.xyz/best_ninja_warrior_of_all_timel74w6.pdfIn PDF document text
    • http://ch-redirect.icu/what_is_the_best_tankless_hot_water_heater_on_the_marketmdel4.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/vevesesekug.pdfIn PDF document text
    • http://forpost-electrica.ru/kumubojekaxumuwajesirp0f4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pexirud.onlinewebshop.net/what_is_the_molecular_shape_of_o3.pdfIn PDF document text
    • http://gawekavadave.epizy.com/ikea_kitchen_cabinet_handle_template.pdfIn PDF document text
    • http://vilumepidiwego.myartsonline.com/bose_sounddock_series_ii_portable_digital_music_system.pdfIn PDF document text
    • http://fasipubaweguguf.rf.gd/efficiency_of_transformer_lab_report.pdfIn PDF document text
    • http://tezixos.epizy.com/jifuwidaforulenadal.pdfIn PDF document text
    • http://roxusenedo.epizy.com/49682407112.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20E 5728 bytes
SHA-256: 1fbe8cc9f53978a9b3df0fa582557e23532e8945b7262792996c00bb47e06cf4
font_01_sfnt_off0000e59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59A 9928 bytes
SHA-256: 35ed6287cc3bae4ac80d00952658e099bff245e3b2145a157a5acf79a92a549d
font_02_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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