Malicious PDF — malware analysis report

Static analysis result for SHA-256 351c67294b42d7e4…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 01:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6de719be5703376440696dc5e7e32951 SHA-1: 7a293919e00c6a80292311c8a181293f0a520802 SHA-256: 351c67294b42d7e40e724d75e125ffba36d701f6064ec7b85d8ff3d7408fd117
166 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, including one to a domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and the overall structure suggest the PDF is used to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://pelibifir.ru/strik?utm_term=best+ecg+book+free+download+pdf
    • http://world-wildshop.com/26209238981rli96.pdf
    • http://servisvds.ru/cover_page_of_report_doce5b3z.pdf
    • http://wivaserana.mywebcommunity.org/work_absenteeism.pdf
    • http://btsworld.org/ruvegemogizezukageki095o.pdf
    • http://pitushok.space/yamaha_htr-5740_remote_codelcc2a.pdf
    • http://smartbright.club/52619301921mohbx.pdf
    • http://tapopapebesawu.getenjoyment.net/tifatidolaramugavaparo.pdf
    • http://hargotel.xyz/diwukufumofiweziziguvepugcmju.pdf
    • http://com-login8.xyz/dragon_age_origins_blood_mage_build_guideh0c79.pdf
    • http://energierecrute-emplois.com/9502916252b16tg.pdf
    • http://trackcreditscore.info/apc_back_ups_rs_1500_reset0y8pe.pdf
    • http://vizionsmc.net/7119055314p7euj.pdf
    • http://fakexexu.sportsontheweb.net/ariens_st824_carb.pdf
    • http://freefire-gifts.com/owls_nest_esplanade_by_night_shift_brewing_boston_mau01af.pdf
    • http://igme.site/football_manager_handheld_2020_tacticsuqzij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/158c50c0-9453-4208-9bef-de9ee7ea8f6f/winepot.pdf
    • https://3c45aaf8-24f3-4cde-9773-cf44a0a970d3.filesusr.com/ugd/ae7d54_9cfe4f6ed8d543fdbdfc9da28e22d5cf.pdf?index=true
    • http://woxesizefibugel.atwebpages.com/download_livro_alter_ego_1.pdf
    • https://uploads.strikinglycdn.com/files/0a472c26-f4a4-491d-969c-d067c0d86070/dias_feriados_de_puerto_rico_2020_accredited_state_chamber.pdf
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_60c05b551821499ca3ea1c65f9577972.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e118d258-a6db-4348-bdff-0e13a369093c/american_standard_oil_furnace_reviews.pdf
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_3fee8d490fc44c00b4c48ce9bd3c17bc.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7cc15f04-2b6b-424c-a3ea-ea1603d8fd4e/jadoj.pdf
    • http://vejegaba.atwebpages.com/6017930062.pdf
    • https://uploads.strikinglycdn.com/files/542f9df0-49d1-4ad6-b9f7-feb6265b1036/sagemcom_fst_1704n_firmware_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6d.bin
b6929d2d69c6a2a5d9a8fc6b39cf353583a5540cd3d0dfd44bcad1e05340c93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 5668 bytes
font_01_sfnt_off0000ffe1.bin
02a48a3ce2d5dcdde9aff80beb2335ed245b463e425bd4fa05da6649a9e463e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 11192 bytes

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