Malicious PDF — malware analysis report

Static analysis result for SHA-256 366e4d921ea6fdbb…

MALICIOUS

PDF

106.3 KB Created: 2021-03-28 17:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48064c8c940044a1f03b5685b01da0f8 SHA-1: 2ec1765aed8d452e34bef0bfdc879d1d64b94f35 SHA-256: 366e4d921ea6fdbb652062f125fdfb888b2a09dd01523efc314d8032201201ad
134 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking a link, likely to download a secondary payload. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://vilenefex.ru/award?keyword=capteur+ultrason+hc+sr04+arduino+pdf
    • http://grusha.space/lobster_ink_bar_professional_answersfhzoj.pdf
    • http://kokolonesafu.getenjoyment.net/tubililegiwi.pdf
    • https://cdn.sqhk.co/livisade/bjY0NjK/eldar_mamedov_jena.pdf
    • http://winoorama.site/2015_audi_q7_maintenance_manualghnxj.pdf
    • http://vitofemegawe.getenjoyment.net/58838974532.pdf
    • https://diwopasod.weebly.com/uploads/1/3/4/4/134475510/wosej_wamunolosi_wevabekavakig_rufutuxavufez.pdf
    • http://ellmax-site.xyz/pebosikakijadoxehp7id.pdf
    • https://cdn.sqhk.co/guranotup/Wjjk1ic/500_words_2019_results.pdf
    • http://sawedes.mywebcommunity.org/short_plot_summary_of_the_maze_runner_book.pdf
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/8040799.pdf
    • https://cdn.sqhk.co/wirowanorax/S7HEFig/fake_cracked_screen_wallpaper_prank.pdf
    • https://cdn.sqhk.co/rowunozimop/ZXhf1hg/how_many_endings_does_simulacra_2_have.pdf
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/2774489.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/rebomedug/vaxutazu.pdf
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_b088812c2e784824bda5b638a16f784f.pdf?index=true
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_34215f4aa6d64512a5aea257bef8566b.pdf?index=true
    • https://s3.amazonaws.com/rujabepifar/canon_lide_220_scanner_driver_mac.pdf
    • https://s3.amazonaws.com/tobaziw/bajetojiwido.pdf
    • https://s3.amazonaws.com/nilafafakem/12865232764.pdf
    • http://kesupipipiret.onlinewebshop.net/formato_hoja_de_vida_sencilla_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f5f.bin
5248b7ff4034a7dcca5ff49a09034e91e0fc223515b524666c54799e6da75272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F5F 5380 bytes
font_01_sfnt_off000161a9.bin
71718c6ff3be7b408cbff214f2afd3751be1b45e427f06b737585ec681cf198b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161A9 14000 bytes
font_02_sfnt_off00018db9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DB9 4324 bytes

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