Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cef7f1ab4b6369…

MALICIOUS

PDF

69.9 KB Created: 2020-11-13 07:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48db189e78d2a418d47b9a89805e0e32 SHA-1: d3eff6f18a4045e44b9e7f73c6113c3dcea3c8a6 SHA-256: 02cef7f1ab4b63695b75f03a061d4c16f7041b981b210d08a8277700bdae58a3
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various domains, indicating a link farm or redirection infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL associated with known malicious redirector infrastructure. This suggests the document's primary purpose is to direct users to potentially harmful websites, likely for phishing or malware distribution.

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/aws?utm_term=god+answers+our+prayers+bible+verse
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f920c2a96101.pdf
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/busifugowobivobif.pdf
    • https://cdn-cms.f-static.net/uploads/4466679/normal_5fa5e1e9c1d76.pdf
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/lusefejowu.pdf
    • https://cdn-cms.f-static.net/uploads/4446260/normal_5fad776f3fdb9.pdf
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f8a905434758.pdf
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/rapubobibusa.pdf
    • https://kijudizi.weebly.com/uploads/1/3/4/3/134321523/xezinu_vivoladuvo_bukunozak_tasebojorixig.pdf
    • https://wabumixa.weebly.com/uploads/1/3/4/5/134585451/sugojazaledamekisek.pdf
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5fa440e71b21c.pdf
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f95ac3d8b002.pdf
    • https://wegogitizunivom.weebly.com/uploads/1/3/4/3/134369171/wojazakopa_pisazekujaf_zewunuwevelebe_zixow.pdf
    • https://cdn-cms.f-static.net/uploads/4414172/normal_5fadbaa8c3918.pdf
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/bunakabewimila.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/349ac5ae-3eb5-496a-b76d-aea509d2f418/componentes_del_cpu.pdf
    • https://uploads.strikinglycdn.com/files/78739dda-713b-42e7-9b95-400ccf6352db/drug_research_project_high_school.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7bc.bin
fdd40d79db111978314d37623aa6d2b2a99509409bb776e2403d9a4259c808e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 5180 bytes
font_01_sfnt_off0000d977.bin
13a3740d24a2dab3e29792752aa1df08e52326a411ddfad1c54d4d4171463eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 10372 bytes
font_02_sfnt_off0000fcae.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAE 4324 bytes

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