Malicious PDF — malware analysis report

Static analysis result for SHA-256 826e539e2f90cdc3…

MALICIOUS

PDF

62.8 KB Created: 2021-02-15 23:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9ad9fc5ba713f464dafa64d303aeb592 SHA-1: a5790ae0f107fe161ca2ccd2bf746eef04746ae5 SHA-256: 826e539e2f90cdc3695f04f1473032bb4f9865c7f1676a1f6f5804e6cbccf96a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://crophysi.ru/wix?keyword=bucks+vs+celtics+live+stream+reddit In PDF document text
    • https://rufukowov.weebly.com/uploads/1/3/4/6/134665675/kupubuwanuda-bebobelamu-salixazopoga.pdfIn PDF document text
    • https://vatovuturok.weebly.com/uploads/1/3/1/8/131856009/7558047.pdfIn PDF document text
    • http://tonorubur.22web.org/xakasogure.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/gazuzegenerinilukipu.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/d4gg98P/boris_and_the_dark_survival_free_android.pdfIn PDF document text
    • https://gotedajasokidu.weebly.com/uploads/1/3/1/4/131407980/9449736.pdfIn PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/5341037.pdfIn PDF document text
    • https://vajepagipe.weebly.com/uploads/1/3/4/0/134000011/nuzikodo-kuzidojafek.pdfIn PDF document text
    • https://xizirasifeda.weebly.com/uploads/1/3/4/3/134344010/7109560.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/cnhc3ig/63071912283.pdfIn PDF document text
    • http://subeziti.22web.org/6705779414.pdfIn PDF document text
    • https://nidoziba.weebly.com/uploads/1/3/0/8/130873853/3415315250.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://genufewewirim.rf.gd/helix_waltz_affairs_guide.pdfIn PDF document text
    • http://fuzulaj.rf.gd/kegonekikizipopukumijogi.pdfIn PDF document text
    • http://lamafuravufezin.epizy.com/free_rsvp_website_template.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_off0000bb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB99 5256 bytes
SHA-256: 69ed80ea6b3d042338ed3cd6478cb2d999c20fb79ba9f3cfc53b696abf99ae7e
font_01_sfnt_off0000cd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6C 9700 bytes
SHA-256: 6066a7edafa9a64663240dd3378c183ada6642a5140258e9cf9e63fda22d58f3

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