Malicious PDF — malware analysis report

Static analysis result for SHA-256 624d24d25ee76271…

MALICIOUS

PDF

72.5 KB Created: 2021-03-24 11:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ccf102f795a38d8e1696d231511359f7 SHA-1: 55e030248318938f1ed11d1a17e90bffa9a242fd SHA-256: 624d24d25ee762714c6bf9e7efd1448ff848814755ad148924c1b39a5f116595
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall heuristic profile point towards the document serving as a lure to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=civil+rights+webquest+quizlet PDF link annotation
    • http://zokidinodajives.getenjoyment.net/descargar_la_biblia_reina_valera_1960_gratis_para_pc.pdfIn PDF document text
    • http://foripekomufotir.mypressonline.com/makalah_balantidiasis.pdfIn PDF document text
    • http://bodagimama.iblogger.org/liramovadoruzubeposafibuk.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/15458177583.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/93724466624.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/35955712905.pdfIn PDF document text
    • http://nuxipawuxodiwa.getenjoyment.net/wupanalapufekuz.pdfIn PDF document text
    • http://xiselegudiwip.iblogger.org/elements_of_design_space_photos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadanokadija.epizy.com/what_to_do_when_wifi_stops_working.pdfIn PDF document text
    • http://kixulal.rf.gd/natelevo.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_a60f8f583ccd4fa0b3223661b5a9eecd.pdf?index=trueIn PDF document text
    • http://muwojes.epizy.com/colombina_mask_template.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_de87c061a6444804b25e67ce0b13f3a9.pdf?index=trueIn PDF document text
    • http://sikovisata.rf.gd/panozopatidobikiger.pdfIn PDF document text
    • http://jelazib.epizy.com/no_fear_shakespeare_king_lear_act_2_scene_3.pdfIn PDF document text
    • http://nudoritane.atwebpages.com/mariage_d_amour_davidson.pdfIn PDF document text
    • http://mojipanitupawo.rf.gd/nijukunopobodutisok.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_off0000dd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 5108 bytes
SHA-256: 9832b0efdf704e0b77c223da063903e0ecbaf816a43f9f78bc166d78cea32cb2
font_01_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 11328 bytes
SHA-256: 402a4125ac0680b06ffc2a388a322ae6553a0601dcc5d6c72b872234abd4e5f2

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