Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dcf72bccb1b395…

MALICIOUS

PDF

70.4 KB Created: 2021-03-14 22:23:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 28f264d93605ef15269be82c9ee55a5f SHA-1: c917c9d0de5e294297afa74a4554da64d473a799 SHA-256: a6dcf72bccb1b395df368f45ac75c308c930ebbc2d9cef355fe48a0fbd994a09
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting and utilize UTM parameters, suggesting a phishing or malware distribution campaign. The presence of external URIs and a link farm heuristic indicates an attempt to redirect the user to malicious content.

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://ponafet.ru/123?utm_term=deadpool+kills+the+marvel+universe+1+pdf PDF link annotation
    • https://cdn.sqhk.co/gutifusuf/c6jajer/83750178185.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/how_to_make_a_baby_snuggle_blanket.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/ihAggLT/slots_lv_no_deposit_bonus_codes_september_2019.pdfIn PDF document text
    • http://zukesijinizik.mywebcommunity.org/labijuzuso.pdfIn PDF document text
    • http://jadusugogawal.iblogger.org/css_grid_grid_template_columns.pdfIn PDF document text
    • http://pifozuvarivin.22web.org/55829340450.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/hfIhjig/tudowabizojexebuwiv.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/iLRgj19/balozarerufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_d0c41f5056b24ce6ba1170e46fb93581.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_30b5ed9f0e8f49c790dfcd5272b9408a.pdf?index=trueIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_6b5ab7e2e58a43ecac555676b0e6531b.pdf?index=trueIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_ff0e09092e78483dbf627f0a3eb1f866.pdf?index=trueIn PDF document text
    • http://kesolimasakifi.myartsonline.com/48668874154.pdfIn PDF document text
    • http://falalovoxiwada.epizy.com/livros_para_iniciantes_na_leitura.pdfIn PDF document text
    • http://kugofabafomozo.epizy.com/51092550013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73eee63e-8b0f-42d1-9311-415b436c82b9/lawn_boy_phish_lyrics_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a6b025-28df-4c42-8654-a9b0f2ee8b20/plot_of_the_5th_wave_book.pdfIn PDF document text
    • http://dadiwewoweziwi.epizy.com/cheap_thrills_sia_live_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb81b8f9-16b9-4524-a073-a7136fddb939/new_super_mario_bros_2_full_game_free_download_for_pc.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/4shard_baixar_musica_gratis_mp3_para_celular.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_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 5456 bytes
SHA-256: decbe4c564fd07221129b69319242b50a2073cc848242d86141dfb0e57d66916
font_01_sfnt_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 10064 bytes
SHA-256: 300bcb52d8fb699e70ea75237f8145f4ddb8a067c4337fc314db57fa865c3721

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