Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c64cb3b4f6dab7…

MALICIOUS

PDF

76.5 KB Created: 2021-04-02 21:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41bc8e0ac1eb45a2ccee6433e3e2ed92 SHA-1: e042bd79b41650695180b2f5d9d7dffafa1d94f1 SHA-256: 86c64cb3b4f6dab7d407d3c2c204204c745c3394383342caae04eabd420e9d5b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to 'ERP implementation project plan template', suggesting a lure to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=erp+implementation+project+plan+template+excel
    • http://sunugukumota.getenjoyment.net/musonabofaxijewopuk.pdf
    • http://bestpriceforukraine.xyz/how_to_assemble_a_nordictrack_treadmill7xpnv.pdf
    • http://zugugalepew.mypressonline.com/98256352483.pdf
    • http://dalkomis.website/antebellum_education_reform_goalsxm2w1.pdf
    • http://nugowimabu.mywebcommunity.org/zuripoxupilitalitusol.pdf
    • http://xuvaguwanolinu.66ghz.com/piletapibujudaxusajejelel.pdf
    • http://marifivelaj.mygamesonline.org/cedula_inicial_de_auditoria.pdf
    • http://tejasatobes.medianewsonline.com/echo_weed_eater_225_string_size.pdf
    • http://mirijesuwakug.sportsontheweb.net/94383983469.pdf
    • http://redirerer.medianewsonline.com/63413523913.pdf
    • http://reduslim-buy.site/yellow_finch_tattoo_meaningarp6a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jiwisi/already_just_yet_exercises.pdf
    • http://laxukumelukadut.myartsonline.com/pirosoj.pdf
    • http://jesuxesuner.rf.gd/zatilazowakawodetujiko.pdf
    • https://s3.amazonaws.com/pegebunov/2289315484.pdf
    • http://katanitape.rf.gd/chipotle_faxable_order_form.pdf
    • https://uploads.strikinglycdn.com/files/ec1674e0-2987-4785-993e-8fdfe895764a/can_i_put_vicks_in_my_diffuser.pdf
    • https://s3.amazonaws.com/ruzumeb/6304242402.pdf
    • https://uploads.strikinglycdn.com/files/96ea81be-7580-4d11-a442-bc25481fa599/lamenoxovudabilunozumebek.pdf
    • http://megugasawixige.onlinewebshop.net/82001167750.pdf
    • https://s3.amazonaws.com/wumodukubaru/letter_soup_answers_cafe_ethiopia.pdf
    • http://revudipepofaten.myartsonline.com/56690732164.pdf
    • http://dukukanakimazup.epizy.com/a_thousand_years_lyrics.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_off0000f07c.bin
424ed2b2c97fd0aad53e594c9289e0974c893f794992f417cdccc4ca9cebc9dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 5004 bytes
font_01_sfnt_off00010174.bin
412ca6ff3b902bf1a7e5e6a97f0b80788f59c5da20d7a802196f8063b33c1432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 10256 bytes

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