Malicious PDF — malware analysis report

Static analysis result for SHA-256 d129803a7fb3ea22…

MALICIOUS

PDF

79.1 KB Created: 2021-02-25 02:28:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1d1e3c0e920e083d8feaeb29a585e4df SHA-1: c07e37b4ce4a720f5e84c6a64a5ec2aa1a510a4b SHA-256: d129803a7fb3ea220a28a09c446b63ee4323b68afb641f619d8fbbd783498061
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded links that point to known malicious redirector infrastructure, specifically identified as a link farm on disposable hosting. The primary function appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=constitutional+principles+worksheet+answers+icivics In PDF document text
    • https://cdn.sqhk.co/kisunika/fAdojbQ/16456737847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_601a4ac354d83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460981/normal_5ff3af5f1d52b.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/nezoselekexizegu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426690/normal_5ff615ca99244.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/Xijig0I/movie_maker_free_vs_pro.pdfIn PDF document text
    • https://rawabupabazokiz.weebly.com/uploads/1/3/2/6/132695668/013d42222d.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/2013_dodge_charger_leather_seat_covers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481699/normal_600804c715c51.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/1279966.pdfIn PDF document text
    • http://banujal.iblogger.org/dell_t30_datasheet.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/10067279266.pdfIn PDF document text
    • https://cdn.sqhk.co/nipumusawobo/jj5idSo/milling_machine_cutting_force_calculation.pdfIn PDF document text
    • https://vobulesije.weebly.com/uploads/1/3/1/8/131857334/fuxoxofariputow.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
    • http://pujumek.myartsonline.com/el_amor_en_los_tiempos_del_colera_pelicula_completa_repelis.pdfIn PDF document text
    • http://palomidifigur.epizy.com/23316325593.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/3d_printing_software_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 5140 bytes
SHA-256: 36c66cb4c4e211134415bd869b8543cad45a4dd554e766dceab5b6faaa5fc114
font_01_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 10176 bytes
SHA-256: 87f2c3e425e629f2860f6d29a39f09fa8afe2fef2f544ca3c5d379e15dff1134
font_02_sfnt_off000120fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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