Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8ed4a709a63b57…

MALICIOUS

PDF

41.7 KB Created: 2020-11-09 11:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: dd5dfb8f88ef0bb0fd880be67ad8c64e SHA-1: 9350fdd8c9896584a39c1c0a156059fabce18825 SHA-256: cd8ed4a709a63b57b361e57edc62dfb5e0e5ff1992f81dd0e0b6863edcdaae33
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://traffking.ru/123?keyword=mypascoconnect+student+login+classlink In PDF document text
    • https://kitujimozudek.weebly.com/uploads/1/3/4/3/134375735/vefafupalejopo-rajefosalubug-kusavebobomiwon-sixidafotoxim.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/4663199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5f94f9bc2a112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5f995cf445a19.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/68fee7a133cbf.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/tupuganugibikizedo.pdfIn PDF document text
    • https://rizulibix.weebly.com/uploads/1/3/4/3/134358491/3714810.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/viromibukoleliw/dd_psionic_powers.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/god_and_the_state_mikhail_bakunin.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/zilosizazasorusaxajiruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cbc6d8b-2454-4a9c-b43c-bfd76e26e9b0/16133573961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e96c14-fea0-432f-a001-c03ab1b3b336/crown_prep_steps_dental_assistant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e62d11-cb7a-46d3-b0e0-1a67a88ee3b9/runkles_in_red_lion_pa_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/nodarefuzis.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_off000063ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BA 5316 bytes
SHA-256: 034ff4e5bae107acbfc4308768ae95c25029c5f8326b94f5e466193ffb489211
font_01_sfnt_off000075fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FD 10624 bytes
SHA-256: 9252f54e964e2f5c8e5d8b907475335faa0ee042005ac8398830de5b8fc9a2a5

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