Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfa3a7d76516edc…

MALICIOUS

PDF

79.8 KB Created: 2021-03-25 02:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3fbb4a29028a63f21b965b84f7cfd2ef SHA-1: c905616f316ac30846b4db85df75253356bc9dfd SHA-256: 0dfa3a7d76516edcc46e6e5c7369f5c954e1a6cc9ee5dbb2f853b1e85eb9ce49
104 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs and a heuristic for a download button suggests a phishing or malware delivery attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://zajinet.ru/award?keyword=assimilation+policy+pdf PDF link annotation
    • http://virujurarajilef.getenjoyment.net/10th_class_maths_formulas_free_download_ssc.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/how_to_train_your_dragon_3_final_battle.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/UM0iajb/airplane_crash_movies_list.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/bexisarofox.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/jesubakisewuzedur.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/resumen_de_once_minutos_de_paulo_coelho_por_capitulos.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/hhhfhc3/20733757352.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/hfibjj5/59166991077.pdfIn PDF document text
    • https://cdn.sqhk.co/bubarozotuj/YAjerjd/farimovi.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ngejijj/0-_60_mph_distance_calculator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nemafu/44344806809.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/tintin_au_congo_1930.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/add_subtract_fractions_with_like_denominators.pdfIn PDF document text
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_a5eb04d58de44deda55659dfe4e57ef7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fazujo/zudowixaseki.pdfIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_d996a572beeb47569048a28c74cb89b4.pdf?index=trueIn PDF document text
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_713e5d36c156445fab8acb50453bb897.pdf?index=trueIn PDF document text
    • http://kedisijusa.onlinewebshop.net/97820795191.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/gakokofiniv.pdfIn PDF document text
    • https://8909b315-4d59-4940-aabf-0fdaa532e0ad.filesusr.com/ugd/4542d9_8b37021678a149b18476d52ac66fcb26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/aoe_2_mac_free.pdfIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_b6b788f5486d42d29ca1df3750dde8b7.pdf?index=trueIn PDF document text
    • https://9cf5cc10-3c2e-4e30-ae6b-73ed7beed88a.filesusr.com/ugd/5c2b46_f055caf62b0c4575a96509bb8e6217c9.pdf?index=trueIn 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_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 5296 bytes
SHA-256: 453e2d52ece76725ae2e51b2dd2f98ca63ee998d583c497fabae17f5465d65fa
font_01_sfnt_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 10736 bytes
SHA-256: f8e8f94be6316c2f119a90d58d888e153eecfc8cd3c4c6bec31412a8ad322f6f

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