Malicious PDF — malware analysis report

Static analysis result for SHA-256 debcdaeb51bf3bea…

MALICIOUS

PDF

72.7 KB Created: 2021-03-04 16:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1740b95f6c33a99f0f56b113bcfdf40f SHA-1: cd6610caeb8535cbbf7e9bf9306ba513e7afd310 SHA-256: debcdaeb51bf3beac1ea9a505b5c26ebae08fe658f3bc5ede50a4375abee7a9d
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://dugedepap.ru/award?keyword=computer+networking+full+course+pdf PDF link annotation
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/32db9c2a4b9a43.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/83874679251.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/sufezebanetazup.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/4137873075.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/sozomelamu-jokopamete-dosilukobelofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482872/normal_601efef13f696.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/33670098847.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/ljcCggR/spring_batch_command_line_job_runner.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/hahcKgi/pencil_christmas_tree_7ft.pdfIn PDF document text
    • https://fibepuranes.weebly.com/uploads/1/3/4/0/134041348/xegukafetavariborej.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/zasatevufukipaxitisep.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/2jityhb/povetabuselovufewokuva.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/xjcjBid/muripufogaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/2vFgjig/lecture_notes_android_app_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fdc6f725af18.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/43107599770.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/XggiaLf/capsaicin_pepper_oil.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/gawirejot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_600b66c2a14ef.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/gogenerezezalilogep.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/jgfR4B4/european_rowing_championships_2020_ireland.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5fc668cc68ffa.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/cjjgOgj/christmas_hair_salon_clipart_free.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/8UGaUhD/72884001287.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimawawasero.onlinewebshop.net/brother_pe800_vs_pe770.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_off0000e056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE056 5328 bytes
SHA-256: 7dd1a2bc8c1a6790ad90f8e93126cf660d1f53d9f09b6adda2b6792af785d00a
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 10112 bytes
SHA-256: d4ecb89ebe975f5464501d00c6895f43d060b38d236150a975423b3ee7f74846