Malicious PDF — malware analysis report

Static analysis result for SHA-256 2382f581926a445a…

MALICIOUS

PDF

70.9 KB Created: 2021-03-17 10:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6c889b828aabc6fb226c84c26142256 SHA-1: 5784742191bfff345352cf54a73c9d147202aacf SHA-256: 2382f581926a445a4769259553691c24b91034129b2fb8f05b7555a23ac35a99
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 0.9996

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
  • 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://jumiwimov.ru/123?utm_term=java++old+version+8 PDF link annotation
    • http://aydym.club/minn_kota_riptide_70_wiring_diagramok07k.pdfIn PDF document text
    • http://subonus.ru/rajovuwovokomitanituv4ts6e.pdfIn PDF document text
    • http://akvatehnika74.ru/home_theater_switch_boxfm4kc.pdfIn PDF document text
    • http://tulutita.sportsontheweb.net/xotiboresowinonowipekule.pdfIn PDF document text
    • https://mokefogo.weebly.com/uploads/1/3/6/0/136086775/wadofere.pdfIn PDF document text
    • http://spoonnumberone.xyz/jisuxulukoxotempybjx.pdfIn PDF document text
    • https://sadebisoj.weebly.com/uploads/1/3/2/3/132302749/jofoz-dijupa-fizasizenimovu-mikemuga.pdfIn PDF document text
    • http://begetus11ppz.xyz/dmv_ct_test_questions_and_answers_spanishhk05a.pdfIn PDF document text
    • http://bigchance.pw/40970332999ig328.pdfIn PDF document text
    • http://lalashoppen.online/xufoseguziwigaruvetagad7z99k.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/42852017718.pdfIn PDF document text
    • http://premiumpornclips.com/67986281669iysgg.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/d5c427.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/descargar_libro_arqueologia_prohibida.pdfIn PDF document text
    • https://puduwuxibipufu.weebly.com/uploads/1/3/5/9/135966859/wujetazijali-madimew-wajeza.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/wujapu/25746316975.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/67163070958.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/how_hard_is_physics_1_ap_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2ead04-8150-400c-9d7a-4e4114961e70/como_se_llama_la_iliada_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22473a19-0c09-4436-861a-4a41540f5f82/jopoxutafi.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/most_common_american_phrasal_verbs.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/how_to_add_transmission_fluid_dodge_ram_2500.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_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 5060 bytes
SHA-256: 060a01f6b4cdd9d8e00fbd3090ab79292ff7a22e9e4b3098639d69700505c462
font_01_sfnt_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 10024 bytes
SHA-256: c3d55e3843d7b125f82f32394dff0a6538cf0139661ba692d51372899090b6a7

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