Malicious PDF — malware analysis report

Static analysis result for SHA-256 7814c2c602316db0…

MALICIOUS

PDF

86.6 KB Created: 2021-03-27 20:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: df611275df8c8a7137911efe15571249 SHA-1: cf7d5918bdc7c7daaf69c481914b3089d1b55d9a SHA-256: 7814c2c602316db05fa5d8528011b2d9160491d1878a3b00ae91ac88f812cd68
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 hosting and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains a query that aligns with the lure of the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=what+is+the+clothing+brand+with+a+dog+logo PDF link annotation
    • http://viniveba.mywebcommunity.org/recent_advances_in_biotechnology_2020.pdfIn PDF document text
    • http://xakaderinetatu.mygamesonline.org/how_to_find_hp_deskjet_2545_password.pdfIn PDF document text
    • http://gokojun.scienceontheweb.net/44158569395.pdfIn PDF document text
    • http://xozawuledol.iblogger.org/sistema_reproductor_masculino_anatomia.pdfIn PDF document text
    • http://leadtop.co/2221423140407cpf.pdfIn PDF document text
    • http://usmileofficial.site/bad_genius_sub_indo_1080pseij4.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/fighter_diet_food_plan.pdfIn PDF document text
    • http://lesedidunug.22web.org/doligafuto.pdfIn PDF document text
    • http://wotedogupowu.sportsontheweb.net/revofizepibodudepij.pdfIn PDF document text
    • http://xalapuzim.sportsontheweb.net/fudakar.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/92369977620.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/mukizagiripod.pdfIn PDF document text
    • http://procripton.com/roleje8yzhw.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/weather_report_buxton_derbyshire.pdfIn PDF document text
    • http://jewlgems.com/monster_truck_mega_ramp_stunts_extreme_stunt_games3gvlm.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/coordinate_grid_4_quadrants.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea52234d-3358-4605-a4ea-4555d9944c50/moxobefatadebaru.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/estudio_del_trabajo_traducir_a_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76c6751-a9be-43c1-b33e-632555a7de9f/renenov.pdfIn PDF document text
    • http://tixogakimu.epizy.com/manusia_adalah_makhluk_sosial.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/63602542559.pdfIn PDF document text
    • http://dufijofitaj.epizy.com/structural_design_of_residential_building_philippines.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_off0001124f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124F 5448 bytes
SHA-256: 6490c65573205b5c7703ffba266a1fcefc7ff61564a817941197039ee192d5f7
font_01_sfnt_off000124df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DF 11224 bytes
SHA-256: c2ae9397b667c5b60e8d1df5387e004bda5a0f06ba5d601e47bd4b71e9c01d72

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