Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da4f12f368a4be2…

MALICIOUS

PDF

77.8 KB Created: 2021-03-22 02:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: aa56de45bb3041889fa5c8cef0b24a93 SHA-1: 4589ae6339fb40731c43d0567e8c26860176115d SHA-256: 5da4f12f368a4be2349953a4a36adaec7356a3fd483b3bef033e843216359b3d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to sites hosting malware or phishing content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=walther+pps+guide+rod+laser PDF link annotation
    • http://matizaw.mywebcommunity.org/netters_surgical_anatomy_and_approaches_download.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/tratamiento_del_asma_2020.pdfIn PDF document text
    • http://liropade.22web.org/99233350083.pdfIn PDF document text
    • http://wajofima.mywebcommunity.org/sarmiento_civilization_and_barbarism.pdfIn PDF document text
    • http://pijabaralipori.22web.org/30061956283.pdfIn PDF document text
    • http://badenodovaze.22web.org/60_years_of_challenge_hand_caressing.pdfIn PDF document text
    • http://zegosuvavanow.22web.org/alkyd_resin_paint.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/pdf_oxford_latin_dictionary.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/cabelas_commercial_meat_grinder_parts.pdfIn PDF document text
    • http://gizapiretade.iblogger.org/8497698202.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/zepujurekagotolipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufojamimusim.atwebpages.com/words_of_advice_for_first_time_mothers.pdfIn PDF document text
    • http://kisutajanarij.rf.gd/chennai_express_movie_filmywap_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ded40a-eb51-4db7-bab7-ed003183ae97/82065341245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7aa031-73f8-4856-af15-be457fe16cff/honda_outboard_repair_parts.pdfIn PDF document text
    • http://somifoviten.epizy.com/84516100843.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_67aa1a2a8c0e4939825c31d167f9f0c2.pdf?index=trueIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_fc7d4acda9924bea9f83954caa86813f.pdf?index=trueIn PDF document text
    • http://zapofekeba.rf.gd/39876464050.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_d81847a3de8c4c8f985af767b1492157.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecdb4b6-b9bd-4ac1-ae8c-8d74f8047d3f/unitypoint_des_moines_covid.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_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 5236 bytes
SHA-256: a01ef456cc1ca7e49ed77c59508a1297bcf8328ccdf7c128ba4095b543f211f7
font_01_sfnt_off000100df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 12332 bytes
SHA-256: d7fd7d67de54256de266ce238a0dd272f37a76511e4edf8ab3a60e0e7e02edf1

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