Malicious PDF — malware analysis report

Static analysis result for SHA-256 28de0571a17e44dc…

MALICIOUS

PDF

64.6 KB Created: 2021-01-30 05:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cdde7fc121bfdd8b4a864c6c2883e955 SHA-1: dbc2822d7e73af668453e6491dfe8a7724368bdd SHA-256: 28de0571a17e44dc24073eb2f5ae197e2921cc53c96b9a8e9420e53b57e0b2cc
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, likely for further exploitation.

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://baarspo.ru/123?utm_term=build+your+own+electronics+workshop+pdf PDF link annotation
    • https://titajava.weebly.com/uploads/1/3/4/0/134096001/nuzonimubisux-xupuju.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/bagcCjb/adobe_illustrator_draw_free_download_for_windows_8.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/9iazBid/26959724377.pdfIn PDF document text
    • http://raffle.website/ai_aoyama_queen_love2rd5t.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/gaporem_javufogokapuza_vipur.pdfIn PDF document text
    • https://zojobowexiwe.weebly.com/uploads/1/3/1/3/131380894/8586218.pdfIn PDF document text
    • https://lofemeraj.weebly.com/uploads/1/3/2/8/132814933/wotizepifatuba.pdfIn PDF document text
    • http://pribor-poverka.site/dobixuxavugotizidogtf59.pdfIn PDF document text
    • https://cdn.sqhk.co/gipudeviwapi/g4777jc/sabiv.pdfIn PDF document text
    • http://vakekaninu.iblogger.org/pulubofefoloxawidexu.pdfIn PDF document text
    • http://swiss-family.space/codigos_para_control_universal_general_electric_4_digitosuo40e.pdfIn PDF document text
    • https://ronunute.weebly.com/uploads/1/3/1/0/131070227/sigusibu.pdfIn PDF document text
    • https://bulobazopikiju.weebly.com/uploads/1/3/0/7/130776241/034b90aa56c2.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/23f72403.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/igMjJjf/play_techno_music_radio_station.pdfIn PDF document text
    • https://cdn.sqhk.co/gobonuzuwif/dhfifhd/81150714500.pdfIn PDF document text
    • http://boomerangoo.site/48746290568vs6gx.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/8162561.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilusizupofa.epizy.com/6599559280.pdfIn PDF document text
    • http://rimamosapike.epizy.com/chhattisgarhi_gana_video_ing_gaana.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_off0000c1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FA 5340 bytes
SHA-256: 8c281ab943e42808cda094162eb58c1ee2fc606d0b63e2d15b9bd17b066f598c
font_01_sfnt_off0000d445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD445 9512 bytes
SHA-256: d53c34d5e240c457df741989c5301aafef67322bb793756d57865eb75286890f

Open this report in the interactive analyzer, or submit your own file for analysis.