Malicious PDF — malware analysis report

Static analysis result for SHA-256 badf17d905e0fa0f…

MALICIOUS

PDF

73.5 KB Created: 2021-04-04 02:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: eecd2eaa5def043b42feaa6c4eb6578c SHA-1: 57ac717a9839a248d094b031364be8ca64bee5d5 SHA-256: badf17d905e0fa0f323aaeab7c9373464cdba12c2b039447b8d9dfd2aa8bc499
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, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=ayurvedic+recipes+book+pdf PDF link annotation
    • https://cdn.sqhk.co/mivesavif/Nkghjdt/mosare.pdfIn PDF document text
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/6404976.pdfIn PDF document text
    • http://dedigevobunobe.medianewsonline.com/tipos_de_asientos_de_ajuste.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/FgeVihA/device_info_live_wallpaper_for_pc_free_download.pdfIn PDF document text
    • http://legezunoj.22web.org/nejevu.pdfIn PDF document text
    • https://saripubisopa.weebly.com/uploads/1/3/5/3/135322362/wijolaligi_fefaruvewoliva_lumome_ninibova.pdfIn PDF document text
    • https://dojosofezi.weebly.com/uploads/1/3/5/3/135390984/tabatusexoxeji-gefiroge-nekalumeforuzas-sokuv.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/3677285330.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/vuzutemalatirititewe.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/69343520730.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://resimibesogew.rf.gd/ford_mustang_ecoboost_premium_price_in_india.pdfIn PDF document text
    • http://wulimazef.epizy.com/10737151363.pdfIn PDF document text
    • http://suzuzozadigij.epizy.com/dazijut.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/how_often_to_replace_battery_in_hard_wired_smoke_detector_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/candy_crush_saga_hack_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/batman_arkham_asylum_ps3_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/1118259844.pdfIn PDF document text
    • http://zukolokemegizut.rf.gd/55764772949.pdfIn PDF document text
    • http://zibakogemigana.rf.gd/popizoboginupined.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_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 5264 bytes
SHA-256: 352c06446cc2d1e736e5a965acca70b4e767e87cb8b8c0cf1d863d89557e7a34
font_01_sfnt_off0000f668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 10212 bytes
SHA-256: 725eecd43a796446eb764c6cf2e7d920df1ec0c7cf5087d9cad8fa7edef3e697

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