Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c34876567e14840…

MALICIOUS

PDF

67.8 KB Created: 2020-11-28 22:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5d9b1b8fcdf851a1b886995287f287e9 SHA-1: df13ecce209c73b4090c60dbd7951ed941d9f674 SHA-256: 7c34876567e148409a7618e7ee449e7706a308bae988f786b75cc7642dfde087
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirector infrastructure or link farms. The heuristic firings indicate the PDF is designed to redirect users to malicious sites, likely for phishing or SEO spam. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to drive traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?utm_term=monte+carlo+excel+data+table In PDF document text
    • https://vedabigejiko.weebly.com/uploads/1/3/1/4/131438046/retowinemebojajoru.pdfIn PDF document text
    • https://vubedokixe.weebly.com/uploads/1/3/4/7/134716192/a4bf12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fb77b8cec45e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417118/normal_5faf94852458e.pdfIn PDF document text
    • https://nigikejogu.weebly.com/uploads/1/3/4/9/134902550/jabit.pdfIn PDF document text
    • https://konibexik.weebly.com/uploads/1/3/4/5/134515119/9028292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f87d79d40ad4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/031e03b3-8652-41c5-b8bb-857e8a4c4e70/64097598357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb359841-1cfb-48b8-85cf-96f88f7daad1/2001_7.3_powerstroke_glow_plug_relay_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14a699c-2dee-464f-a09b-ab1d095cc4bb/wizofetifaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1803602e-73d8-48e5-a399-b7300aab4b31/tamesefelonelezudap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e3bcb8-4df6-463b-aebc-1007ca75b455/27129906168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf67cda4-2dcd-4964-97ed-9829116a3d7c/99896403206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d4f304-efcb-4cdd-9841-178e951751ec/base_de_datos_opus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216fe219-2a7a-447e-a482-fc0a9018e15f/prepagata_paypal_saldo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8d4198-1476-45c0-aa60-084e9eac7be9/physical_science_unit_2_study_guide_answers.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_off0000ce73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE73 4968 bytes
SHA-256: 02aa53e2337d0a8c88bd375dbfa63fc2f0d8f1ab9cfa873649115b7acc5c4f8f
font_01_sfnt_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 10172 bytes
SHA-256: af4bf1e5eca3c4f322d2d8d8c0727f29806c8431ab6d8080bc550b932488f6a5

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