Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda5700f48fa8d05…

MALICIOUS

PDF

70.8 KB Created: 2021-03-06 21:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f171a0ad8c1e1f291255497cc2213be2 SHA-1: 2784116eea47dd2eec0459fb5d3358a2537ad8ba SHA-256: dda5700f48fa8d0565aa50febcc3b6c6155a6e4b80b700ef21e15e8d5926ed98
186 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://midufefew.ru/award?keyword=how+to+do+limits+with+square+roots PDF link annotation
    • https://nakagikirowi.weebly.com/uploads/1/3/2/6/132695306/divefula.pdfIn PDF document text
    • http://hookup157.site/96930903151asjrm.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/final_walk_through_form_for_tenant.pdfIn PDF document text
    • http://remontnatali.ru/texas_instruments_mechanical_engineer_salaryfpg8s.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/99c3fd14f2eec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_5ff691c428361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_6027c4c4b6556.pdfIn PDF document text
    • http://ag-management.space/businoro7ekn.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/godub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_601e8668e813a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454438/normal_5fffef13cde80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5fca5e63e0557.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/e7fef702b.pdfIn PDF document text
    • https://najabokaxosol.weebly.com/uploads/1/3/5/3/135300306/mafuwikusop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fee453f785c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_601e2e8c9f339.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_1ca379c0d0f840e6b7c6b81f735f0385.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_741470d3d85c40839c3b706c7cacf643.pdf?index=trueIn 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_off0000da4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4D 5244 bytes
SHA-256: ecdebc9b1cbd85c969d35c3ec62a753531eba611183f93380fb0f1e221b00487
font_01_sfnt_off0000ebfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 9980 bytes
SHA-256: 8d95ec57028d8b8da5ebc3f29492b7f88787bc696c7df7ae090b5667e371db35

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