Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2023e4f9cc8a47e…

MALICIOUS

PDF

140.4 KB Created: 2021-04-03 09:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 532922ecb79fa86265ac382afdcebc92 SHA-1: eec518f907d16d03ab5d1fee7a3ffae8d0ba2c83 SHA-256: d2023e4f9cc8a47e857cfe93c1a32923f3f9439602693f94915e615aa12891ef
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 hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing lure designed to redirect users to malicious sites.

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://dugedepap.ru/strik?utm_term=calvin+and+hobbes+books+buy PDF link annotation
    • http://wisecredit.info/happy_wheels_free_full_gamed8ji5.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/37989879616.pdfIn PDF document text
    • http://migerov.xyz/garmin_430w_software_updateaj3nf.pdfIn PDF document text
    • http://kungfumalibu.com/firufunireranurlbg.pdfIn PDF document text
    • http://aycotoro7.xyz/frandsen_rd_anatomy_and_physiology_of_farm_animalsarmzt.pdfIn PDF document text
    • https://cdn.sqhk.co/nemisova/fghdgjv/bubble_level_app_for_android_phone.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/69389037391.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/jcoq2tK/rope_hammock_chairs_for_sale.pdfIn PDF document text
    • http://xibiselid.medianewsonline.com/assault_bike_workouts.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/71749621414erzlm.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/10436684406.pdfIn PDF document text
    • http://zowogusatutojus.mywebcommunity.org/descargar_antecedentes_judiciales.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/d9acb713-1ab4-4a4e-b66a-0ce81592e959/6_easy_strength_training_exercises.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/40544400382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e819df-de48-49e1-bc08-37f4fd8af978/which_security_dvr_is_the_best.pdfIn PDF document text
    • http://jadefixadejin.rf.gd/make_money_watching_youtube_ads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa03f7b-d5f2-406d-b561-7d5a0c8b7f36/divesovoxuparokogotusebuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c09bd9-1815-4c42-9878-92fc1f11b51b/dubunixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62be3dc8-fd6b-443a-8ef1-935c9f885281/gijexu.pdfIn PDF document text
    • http://pirefalanife.epizy.com/wisilevenul.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8BF 5088 bytes
SHA-256: 68a168e9ea43c702f77927f67ccdc4ff8dfacfb4f910ab848b3b988219342ae2
font_01_sfnt_off0001fa0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA0D 12156 bytes
SHA-256: 0ed164a0209a4ad15a85bec2901fe647e5f03b9c0ef60dcdd37d54eeca19dbc0

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