Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd883f232e42867c…

MALICIOUS

PDF

78.5 KB Created: 2021-03-23 11:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bc8f7af639e6d6613006724982de737c SHA-1: cd616d5e8faa10055ec81e138ece57e51c786c89 SHA-256: fd883f232e42867c4690c7b03632a3b39fd31c68c51e9992c9520979ebe766db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to link farms hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/award?keyword=robotics+engineering+subjects+pdf PDF link annotation
    • https://cdn.sqhk.co/sozimelizak/ggDjjii/dont_touch_my_phone_muggle_draco.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/dAhf3M0/levopuso.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/8250266.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/41222162415.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/voner.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/8709624.pdfIn PDF document text
    • http://vizimuvorogo.22web.org/live_bus_times_app_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_5fd5efdf77d6f.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/6hddhhe/milirugowibawukekopow.pdfIn PDF document text
    • http://zawexoserolexi.iblogger.org/coshocton_county_sheriff_s_report.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/netizigimig_resowiko_vawiwosalu.pdfIn PDF document text
    • https://cdn.sqhk.co/rukugewul/iifRXnm/minecraft_game_download_hack.pdfIn PDF document text
    • https://dalosetog.weebly.com/uploads/1/3/1/4/131412235/1631003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_6037cee4eab06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5fd6d1c2ac6f7.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/60054237574.pdfIn PDF document text
    • https://tasakexer.weebly.com/uploads/1/3/4/6/134669330/zokigokesa_tuleluki_zonatakefuduf.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/h2jfmLn/certificate_of_service_template_florida.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/ce09e4f7-d1c8-42e4-a994-c4e418b58a6b/48387113169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea84e2f-e33b-4ea8-b9d3-c9d88ad41784/51836222989.pdfIn PDF document text
    • http://xotopusedewix.myartsonline.com/48101899586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d039c3-9c23-4653-8c96-c16421377000/what_does_expiry_date_mean_on_planning_application.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/96922921013.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_off0000f63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 5304 bytes
SHA-256: 11ccd64cc82654c1f24bbfe73eda6997a344b9d244e540050cfa930a0b3b7373
font_01_sfnt_off0001085c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085C 10600 bytes
SHA-256: 3792cc03c8db4855f2d38c4247281aec11f7ea1f94488f61b157dc465cb3784c

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