Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb2fea9e6074114…

MALICIOUS

PDF

74.9 KB Created: 2021-04-05 07:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4b6e2832088e2283bca0555aeeff3a2f SHA-1: deb9cc5f67d05f1f39007b78021c30d1e17789ef SHA-256: bcb2fea9e60741149735cd29873f053385438cea0de5113fea06ceac71073468
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://crophysi.ru/strik?utm_term=does+tai+chi+help+lower+back+pain PDF link annotation
    • http://creditreportus.info/497008091321jt2x.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/xebonixuda.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/dGkgcih/xoluwavuzuvojokip.pdfIn PDF document text
    • http://rifijetuvijilam.medianewsonline.com/gujarati_to_english_speaking_book_free_download.pdfIn PDF document text
    • http://mon-compte-cmb.best/722155101041fgr7.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/64991069803.pdfIn PDF document text
    • http://hackins.site/zaxovelegomogopabadofoc77go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_600afedc154cf.pdfIn PDF document text
    • http://avto-document.site/12559460196g171i.pdfIn PDF document text
    • https://cdn.sqhk.co/gisefezuzif/jjiiidb/pc_architect_advanced_pc_building_simulator_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454424/normal_5ff633210ccfe.pdfIn PDF document text
    • http://recepty-dd.info/tabudafupipubumutik1c8r.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/Jztiaif/clash_of_clans_th12_attack_strategy_2020.pdfIn PDF document text
    • http://checkmycredit.info/dupavovepugaryudy7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392652/normal_6018bf7c9a3a2.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/pzgfhfp/candy_crush_saga_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/2hcVgeB/turret_fusion_idle_clicker_mod.pdfIn PDF document text
    • http://fitnesspack.net/newofanazatowasfwpl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sitafefisoju.atwebpages.com/insignia_converter_box_remote_app.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/materi_biologi_sma_kelas_12_kurikulum_2020.pdfIn PDF document text
    • http://situwosase.myartsonline.com/31488956716.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 5316 bytes
SHA-256: 5fa68e21554a96078de58457e972145da2685a25b849383a2364e745a0eb7305
font_01_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 9996 bytes
SHA-256: 3d4b1d14195ddf551d578794610442ba843854ad27c528f2a66060a7b5d1b4b6

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