Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dfb3fc327789599…

MALICIOUS

PDF

77.8 KB Created: 2021-04-03 01:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 19b36bfcba17b1f4284d59fb3d746440 SHA-1: b547bc8340bcc8a7471eeda68f6cb1e9119cd93e SHA-256: 9dfb3fc327789599047685d19d47604c2c7516b84d24fe693849af8fc1647359
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are presented as downloadable PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a large number of links for SEO manipulation or to host malicious content.

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://pelibifir.ru/123?utm_term=total+eclipse+parents+guide PDF link annotation
    • http://ninomut.sportsontheweb.net/nursing_care_plan_for_neonatal_jaundice.pdfIn PDF document text
    • http://bizbize-yeteriz.org/hideki_tojo_world_war_202cjs.pdfIn PDF document text
    • http://dojemop.mywebcommunity.org/adding_worksheets_for_kindergarten.pdfIn PDF document text
    • http://levelupguild.com/1051455081s0c1j.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/gojufemudisuwe.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/tutorialspoint_asp.net_mvc_core.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/dupemiduzekoka.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/la_cancion_de_nosotros_eduardo_galeano_gratis.pdfIn PDF document text
    • http://doucheapp.xyz/femamufunugoeubtg.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/20583856527.pdfIn PDF document text
    • http://dorightunion.com/cecil_textbook_of_medicine_24th_edition_free_downloadmijpo.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/jenevifereluvaf.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/beats_solo_3_vs_studio_3_vs_pro.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://s3.amazonaws.com/fejakixoweka/modo_congiuntivo_tabella.pdfIn PDF document text
    • http://pidusagi.atwebpages.com/christmas_carols_piano_music.pdfIn PDF document text
    • http://nabafutig.myartsonline.com/an_introduction_to_film_genres_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/angular_js_mobile_app_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/dyson_airwrap_complete_user_guide.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/lujirufizamupuwelamebilo.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/sulatodovuruxesatakeza.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/tunavolelapufoxusukowizex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64A 5072 bytes
SHA-256: f62642f977f3c3df5bb1238375d0ec52ea7ffe399952fb8f0b78ba9b097c987a
font_01_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 10488 bytes
SHA-256: 09f51dfdabb4e7321b0e722c5493b38da6b3a178764997705cc44f39f66c67c2
font_02_sfnt_off00011b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B49 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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