Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5df0a69bcfb84d4…

MALICIOUS

PDF

88.1 KB Created: 2021-03-12 17:50:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e329c9121e7b34f138967e27a8c9c387 SHA-1: 98e56df7652f8c1b967747f1e14e744ec5f5d802 SHA-256: e5df0a69bcfb84d4ae6002880ea8a9479bc56b4ca226d3446d2cf68a36c0e4c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=is+roomba+985+same+as+980 PDF link annotation
    • http://nout-sale.site/57430976710x4576.pdfIn PDF document text
    • http://neo-tp.ru/povejejifaxugxyiq.pdfIn PDF document text
    • http://siteznakomstv69.space/descargar_plan_y_programas_de_estudio_2011_tercer_gradozbq01.pdfIn PDF document text
    • http://fuviguz.22web.org/sonda_vesical_definicion.pdfIn PDF document text
    • http://pearhaidhr.fun/diplomat_watch_winder_repair2imrh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_639c4f4c68444565a7f9e495dc4beeba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/patajogupupidinafapamis.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/consumer_reports_best_hepa_air_purifiers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6194d7aa-3fe4-42f5-ac8e-43b1b3f30b25/what_kind_of_fast_food_is_gluten_free.pdfIn PDF document text
    • http://xewebumobodoris.rf.gd/angular_8_reactive_forms_file_upload.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc26a46-8fd3-4652-a26c-b0ba7e71d13b/what_is_the_ethnicity_of_white_american.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_eb0785895c544a36a4b1650b4d3c10f7.pdf?index=trueIn PDF document text
    • http://gavofuduwaxene.epizy.com/72593558639.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_0523517a3b8745c583a10cc8d89b68de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zedudo/castlevania_gba_roms_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f87a802-08a7-4e1a-8e88-ec6242275bbd/are_gluten_free_foods_healthier_for_you.pdfIn PDF document text
    • http://wutagokavejeve.rf.gd/12124151859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff27e34-2a68-47ee-b7e1-d468e75982c2/kali_linux_2020.2_update_command.pdfIn PDF document text
    • http://zesaxisakonona.epizy.com/cambridge_igcse_physics_workbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6ecf3b4-16ed-435d-80e1-31e41321b09c/dell_precision_t7500_max_ram.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_off00011c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C27 5492 bytes
SHA-256: 16c741fca5d04f17709669562575dcfb568198390952237fa4981048f2f70a1b
font_01_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 10680 bytes
SHA-256: a213011c62bb6b3cce19b6180f86040cd86f4a73492ff88459c63c1eb60c9dfc

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