Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cdab4708ee3fe8…

MALICIOUS

PDF

134.5 KB Created: 2021-03-19 06:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2491327b67842d78c534c9d47499fec8 SHA-1: 9e689f427ff40c8f8106970da348d5342e278490 SHA-256: 65cdab4708ee3fe80c35b175e92be3e307a53a3f466ec2b87fe7880b33b12b16
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'disposable link farm' heuristic strongly suggest the document's primary purpose is to facilitate access to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://gimoguvi.ru/wix?keyword=air+force+rotc+uniform+regulations PDF link annotation
    • http://nazixoja.iblogger.org/arpan_film_ka_gana_video.pdfIn PDF document text
    • https://cdn.sqhk.co/jopogoxom/GHiaijt/49962645625.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/vox_tonelab_le_manual.pdfIn PDF document text
    • http://zuzatew.medianewsonline.com/99538152865.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/hbpS7z4/brand_new_day_kodaline_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_602b50b036a6e.pdfIn PDF document text
    • https://cdn.sqhk.co/sugojipo/QjeLgeI/chorlink_retro_game_console_review.pdfIn PDF document text
    • http://jefuvumerusew.getenjoyment.net/jj_benitez_caballo_de_troya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_601b426fd30a4.pdfIn PDF document text
    • http://nopowajowopu.iblogger.org/jofalixazujafavalezap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490370/normal_5fd94b1db665c.pdfIn PDF document text
    • http://sebofafekorav.iblogger.org/tanaman_asoka.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/96548076663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd8af03a6e6a.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
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_67a83a98cc0341a09ca0e14b7f7ac100.pdf?index=trueIn PDF document text
    • http://kofuzedu.epizy.com/devex.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/life_and_death_twilight_ita.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/97771955859.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_daba3b25349d42be8b12493ab739e878.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_705c53ea05cc4ddba669a6956b427590.pdf?index=trueIn PDF document text
    • http://sovizaz.epizy.com/analytical_methods_for_engineers.pdfIn PDF document text
    • http://gometupibi.rf.gd/how_to_lead_an_intercessory_prayer_meeting.pdfIn PDF document text
    • http://tizerusop.rf.gd/texas_postnuptial_agreement_form.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_off0001c618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C618 5072 bytes
SHA-256: 299ac35af493e3241ba5b22a967d06e0a4d71901a1f2feea4f6d21c02d1aaef5
font_01_sfnt_off0001d737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D737 10848 bytes
SHA-256: 2bbd86a4410cbd0f053b7303db9396884e33ea1ff32b433b14f190f8364fe8d3
font_02_sfnt_off0001fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC37 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34