Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fac31c8fe8720a8…

MALICIOUS

PDF

73.8 KB Created: 2021-03-09 00:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c6f799abeac50c536e8011c1fb3a6153 SHA-1: 932c636051c6dbcc06b41005351f560ef6c68d76 SHA-256: 5fac31c8fe8720a868010acb0a885c11f691cc7df7a522ba49ff36ca5cf2370a
186 Risk Score

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, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate potential for malicious content delivery or redirection.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/award?keyword=knust+admission+list+2020+19+pdf PDF link annotation
    • http://manovina.mypressonline.com/2012_grand_cherokee_overland_value.pdfIn PDF document text
    • http://vodaxuf.iblogger.org/belebute.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/hghhbqF/84426171196.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/RXjcgdi/drifting_and_driving_simulator_honda_civic_game_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/hMUggkB/zutamufelujofonu.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/hjhdFzJ/kurexosanomutijeg.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/n8jdBUd/neon_snake_print_bag.pdfIn PDF document text
    • https://cdn.sqhk.co/penazavoxu/jhfPhgi/arere_yekkada_yekkada_full_song.pdfIn PDF document text
    • http://mipesubukef.iblogger.org/10-_day_weather_report_for_atlanta_georgia.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/bgeUCgj/rokajapedasowif.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/i4xjagh/89626973803.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/trials_of_apollo_book_3_free_download_archive.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/87752759270.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_1bc8f8a20ab44351bee020df96aa2196.pdf?index=trueIn PDF document text
    • http://vuvodulewuxewe.epizy.com/kentuckiana_court_reporters.pdfIn PDF document text
    • http://zunotewa.rf.gd/tezugimeganepefegofunepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76540d75-f879-46dd-857a-05f8d9faf407/a_pair_of_silk_stockings_plot_summary.pdfIn PDF document text
    • http://jalebuvubo.myartsonline.com/40575206610.pdfIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_dd977a38d0c24c25baffa80091b2d89a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d00eb5-f000-4f0c-8c8e-e633237647f7/thule_roof_rack_bike_attachment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368e4acd-6a8a-4882-8a63-2e214c8ff6a3/ejemplos_de_guiones_de_teatro_cortos_para_jovenes.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_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5540 bytes
SHA-256: ae35467918a8bc519410fe51e13dc1782bdb3d2006ce176b09b9e125b0d9200b
font_01_sfnt_off0000f70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 10204 bytes
SHA-256: 9b267de90ba2b5d00e2267b44cb52ccce1108b883d209103a4f1d2acfdcd5fce