Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de81670ae93afb8…

MALICIOUS

PDF

82.6 KB Created: 2021-01-18 07:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-30
MD5: bbbd1fdbcbb2bd56061bdacd17c82bc2 SHA-1: 0ce3199232f1fd6da35c4517d76f3708fa49f5b9 SHA-256: 4de81670ae93afb87bd0860677f3e4fc1400fe0b89bfca8d76ba8dcf88372dbd
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://ggtraff.ru/wb?keyword=galaxy%20pop%20bubble%20spinner In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5f968518cef09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5fac5363357d9.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/Gnjdjhs/89645507222.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/a8YOicZ/check_your_balance_etisalat_uae.pdfIn PDF document text
    • https://fabevapomuwi.weebly.com/uploads/1/3/4/6/134607330/mixivodolutab_fifivodak_vodidowemov_zebubenokubo.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/6008433256.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/jemadodinojideporipuk.pdfIn PDF document text
    • http://manoligixave.66ghz.com/happy_birthday_wishes_video_status.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/6iigeje/mitubosaxal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fcf0746666f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443810/normal_5fe94f8169919.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/i4gcyij/23352024549.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/being_alive_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/2ELYwUx/3514568644.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000ed2c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000ed2c.bin)
    • http://tujevudaxuxos.epizy.com/52995863795.pdfIn PDF document text
    • http://xesidif.epizy.com/fisiopatologia_del_pancreas_endocrino.pdfIn PDF document text
    • http://towawemigegi.epizy.com/valukuxexutogupoligaruxo.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 extracted file (font_00_sfnt_off0000ed2c.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00012563.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00012563.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 5156 bytes
SHA-256: 6ce630f00e703bc1e07a8583e6874267f6c75c0aa5c754921e499d11635f81ea
font_01_sfnt_off0000feca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECA 11376 bytes
SHA-256: 6fced0209dc58bccf72f8eeb9b6d9219265a1f6c3247a0e029b235f35cf72425
font_02_sfnt_off00012563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12563 16416 bytes
SHA-256: 4bf7462e787791ee30cced4e4a0065977ba460b587ec5e4d0bf31a1282398818