Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a108112e0640f36…

MALICIOUS

PDF

69.9 KB Created: 2020-12-19 02:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ac03f6483661c1057e52f219dc4c3bc4 SHA-1: 70d7e72fff5d908bfc94d25ea8596ff10ec6fcb1 SHA-256: 3a108112e0640f36c2285cb9332580028ea2c3abf2ec3b707b2f825f76064d2d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, with a significant portion pointing to potentially malicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. The presence of a link to 'trafficel.ru' with a query related to popular movies suggests a lure to attract users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://trafficel.ru/aws?utm_term=hollywood+movies+dubbed+in+tamil++isaimini PDF link annotation
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/jolazabakanerilula.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/606fb610-7708-40de-a50d-3b906aaf3d33/8403024423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2739f3e4-8cc5-4fca-83c0-0df338650033/garmin_nuvi_1490t.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/dog_vaccination_schedule_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a47f60-e8c2-4d57-a12b-00a332548717/49775588781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a742f1-64bb-4878-93a9-8f8e939256c3/duruveresexufi.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/98692499847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b082de27-5759-4dc9-9513-c6c1b8a17d9a/fonizebapebutozowizojuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/lasasokufepazo.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/monolufebakusav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23830962-e014-4f1f-872d-52ef69245c65/nobody_likes_a_cockblock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb5156e-795a-48ef-8f21-8371808b7f9c/national_junior_honor_society.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/structure_of_plant_viruses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/412d2ebd-9bc4-43a7-a384-4ae8cd9c0067/lien_waiver_example.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_off0000d3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DE 5228 bytes
SHA-256: 92475cc41cd1889d03c690fb0fa60175a767de1fbbaf98f0e20a70defc724f66
font_01_sfnt_off0000e5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AC 10828 bytes
SHA-256: f2e2eb5b4e9c413f75e556bfe2b7da00bf5c36dcec30eb6fbbacd8d5a0e77f3e

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