Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d9097402e56359…

MALICIOUS

PDF

89.6 KB Created: 2021-03-20 00:07:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 817225eecd1b435a0ff4da5a5af1f0b0 SHA-1: dd60c4c595454d4ddd568794a42654526eb9044e SHA-256: 94d9097402e56359a934c25fc5cb83bca2f37987680bd497ee3000b55ce04db1
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious URLs, with one explicitly noted as an invisible link designed to lure the user. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or delivering a secondary payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://vilenefex.ru/award?keyword=medical+terminology+abbreviations+list+pdf
    • https://cdn.sqhk.co/tawibonikigo/ijcwea4/bomber_friends_ios_download.pdf
    • http://xepewifub.mygamesonline.org/bezomikadejedakaneji.pdf
    • https://cdn.sqhk.co/luwagoma/iijjKji/sadness_inside_out_costume_party_city.pdf
    • http://nat-fru.space/pokemon_yellow_saffron_city_silph_co_walkthroughtqdwj.pdf
    • https://cdn.sqhk.co/nixagigad/gmidzji/boutique_ad_agency_nyc.pdf
    • https://cdn.sqhk.co/vilubofi/SUcgf9q/best_weather_apps_for_android_phones.pdf
    • https://guwusupokase.weebly.com/uploads/1/3/1/4/131437041/9394073.pdf
    • http://miwasigal.mywebcommunity.org/pivuvaxipapurisa.pdf
    • http://nezowigivomi.scienceontheweb.net/48005291596.pdf
    • http://kebuwakuje.medianewsonline.com/esterilizacion_desinfeccion_y_antisepsia.pdf
    • http://dewisazovuvoxi.mywebcommunity.org/afterlife_lyrics_future.pdf
    • http://lipexifinidoda.scienceontheweb.net/mismeasure_of_man.pdf
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/gavasovejon_baduvanafinofof.pdf
    • https://cdn.sqhk.co/savunowudob/eZjiqic/rimiti.pdf
    • http://managerprogram.live/27110501960hl36p.pdf
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/c42afe48b.pdf
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/94cd410d5c7.pdf
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/563177.pdf
    • http://antonioita.fun/how_to_crochet_chain_stitch_for_beginnerskzy62.pdf
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/e27b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://manuwakagekewu.onlinewebshop.net/kemitekaziraj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011172.bin
812d82e7cdb9613383ca512555314b8703ed51660a0dd00a3097f5afeae147e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 5568 bytes
font_01_sfnt_off0001244f.bin
821b451ce2d802a6b5a7c20a25e8224af5db80b7469b8e925768f355ab11c91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1244F 11372 bytes
font_02_sfnt_off00014acd.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACD 4324 bytes

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