Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d89fef7ceabf79…

MALICIOUS

PDF

66.3 KB Created: 2021-02-11 18:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 53fc03efc2b7d9662f1e1abf86bbb6c7 SHA-1: 14ad1f475e4a10480366a63e1d5cc0bce7f099d0 SHA-256: 51d89fef7ceabf79aa3919a9408ff2f88c771f7354a1c6821a87b9c33d3f6836
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=call+of+duty+unblocked+zombies In PDF document text
    • http://matras-24.ru/melatowagumevojoxikevunuv2w4g.pdfIn PDF document text
    • http://santand-es.com/five_nights_at_freddy_s_characters_namesth5fb.pdfIn PDF document text
    • http://hookup154.online/lg_mobile_switch_backup_frpwcyl5.pdfIn PDF document text
    • https://poxuroli.weebly.com/uploads/1/3/0/7/130738943/1cf167d3c10dcd.pdfIn PDF document text
    • http://mmmmmme.space/navalabomizazotelusom3h43.pdfIn PDF document text
    • http://successinyourlif.website/indonesia_stock_exchange_minimum_free_float5k7qs.pdfIn PDF document text
    • https://sejomuxajifaged.weebly.com/uploads/1/3/1/4/131437693/xuwulijefa_lutedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vaburerewixa.rf.gd/56910790295.pdfIn PDF document text
    • http://jojajixinoxu.epizy.com/16527659923.pdfIn PDF document text
    • http://dojagosixotebut.rf.gd/cdc_guidelines_for_hep_b_booster.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/pusatabezetuxokixowomel.pdfIn PDF document text
    • http://badivisixeg.epizy.com/56606468460.pdfIn PDF document text
    • http://xenivut.epizy.com/vector_blue_technology_background_free.pdfIn PDF document text
    • http://fosoxubap.epizy.com/nukoleranatozigotapi.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/90890668550.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90F 5332 bytes
SHA-256: be09a480da33dc442f8caebb06fd7171b5de269e5b3a0f34e15dd74e29048556
font_01_sfnt_off0000cb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB39 10164 bytes
SHA-256: ea43a766ff8ad74acdd9fb5c0985d711dbdcbbe802fa8d91c826222dfeb13396
font_02_sfnt_off0000ede5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c