Malicious PDF — malware analysis report

Static analysis result for SHA-256 df37f84a2a905323…

MALICIOUS

PDF

68.6 KB Created: 2021-03-07 22:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 06ebc2a3575085b467477812b0506405 SHA-1: 0311986af2c55080919786ed0732c53a626b9426 SHA-256: df37f84a2a9053231a0f12ea0351236456e1a43ae276bbe03112aaca2c862ebe
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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=ap+calculus+graphical+numerical+algebraic+4th+edition+pdf In PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/1370002.pdfIn PDF document text
    • http://chisto-chisto52.ru/34838234288e2hzw.pdfIn PDF document text
    • http://mon-cmbretagne.best/litufebobarofot7qm.pdfIn PDF document text
    • https://zofumevovuve.weebly.com/uploads/1/3/0/8/130874077/xusaxibupanuveso.pdfIn PDF document text
    • http://bezprovodov.guru/kerio_control_statistics_email_reportc0b2j.pdfIn PDF document text
    • http://visiwetivopewe.iblogger.org/95550084943.pdfIn PDF document text
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/5112578.pdfIn PDF document text
    • http://thesalle.xyz/54095224547halxe.pdfIn PDF document text
    • http://tumbochka.space/what_is_the_correct_order_of_performing_mathematical_operations_in_simplifying_expressionstu1mc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujividexisero.rf.gd/32123109653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e5e4c7-6db9-407c-be13-0daae66681ba/dell_latitude_e6410_webcam_drivers_windows_10_64-bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d48596-8d8b-4650-823c-1c0665bcf9cd/barnett_vortex_compound_bow_youth.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_b0b04847e1874143b965f655bb445186.pdf?index=trueIn PDF document text
    • http://misosemarimo.rf.gd/62743077.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_49af8162e7ce428fbef9e781bc6b21b4.pdf?index=trueIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_6baeb84e3a854d72b3c8da64b6539eff.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_207f0d8b7cd246b495b1a79a25605b00.pdf?index=trueIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_4f2600e58fd8416b8203cf311ff504ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e9ff29-e90e-4ceb-8333-125c5aa6e00e/87760138790.pdfIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_40a6e78a1c9f4bd0add64624cc5946e6.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_off0000cec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC9 5784 bytes
SHA-256: 5141442b6ccd3828fc37b01b17bb7bcd8ab96555d18a903feecb5eb326a43227
font_01_sfnt_off0000e248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 10124 bytes
SHA-256: 700e19f445b2cb433d25873dc9e22cd8bf0426e6c351e1da75c0d910f856992a

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