Malicious PDF — malware analysis report

Static analysis result for SHA-256 3705276fb8cf0c5f…

MALICIOUS

PDF

72.5 KB Created: 2021-03-04 07:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cdccdc3430ce31787a908045e22265f0 SHA-1: 2227efab788c089b3b0ee2d903fd752d3a79f5f4 SHA-256: 3705276fb8cf0c5f4cf097a22c3c8bc4f86a32dc68fe33c2c1d58a7d9b9c3a76
184 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=friendship+yahoo+answers In PDF document text
    • http://suzupuwejal.mygamesonline.org/scale_drawing_practice_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_603f3f909fe4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5ffd281da0b44.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/ritejafavapuka.pdfIn PDF document text
    • http://ferategaj.scienceontheweb.net/54305481012.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/hal_leonard_guitar_method_book_1_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452376/normal_600293ac51b92.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/kexateropedawajigamukq1rj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fceac36131c1.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/96912713788.pdfIn PDF document text
    • http://santecmb-sarl.com/ernest_hemingway_books_1920scahgq.pdfIn PDF document text
    • http://martans.space/how_to_day_trade_for_a_livingxrx78.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/34743596790.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/school_testing_coordinator_job_description.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/zoromexemuzid/can_you_convert_to_jpg_in_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/tunixibefuxezivomovolen.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_off0000dff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF1 5164 bytes
SHA-256: 712aac3c3596ff84f72e28478b1d48a49cdfe1d0adf3d02ce19ea5e10ae08967
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 10620 bytes
SHA-256: ac466c1944b082ea443a878f9095ea11065b9d58bc23addff40305e4fddb52e9