Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfee1b9f63a4c26…

MALICIOUS

PDF

65.2 KB Created: 2020-12-04 13:33:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 97f8120132cb60cfe5f7abb89588982a SHA-1: 95cdafd8f748fb44a892712d39de9a759f9b07c3 SHA-256: cbfee1b9f63a4c263d2881fd97b20b2d903628194c218e11d5ed43950346a62a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffset.ru/strik?utm_term=spectrolinker+xl+1500+uv PDF link annotation
    • https://vokudaminovisuz.weebly.com/uploads/1/3/4/4/134495340/zoxamojubokefak.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/0fba512ae15fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tadevewuju/jefepikenoxaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c75714c-a50c-44f8-bec4-c6de0838f511/on_parmak_klavye_dersleri.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/778224462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1d6040-e0f0-4e29-917f-d24cbd56d567/40048640068.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/pokemon_platinum_underground_fire_stone.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/affidavit_of_equitable_interest_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/bevisemasika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8242e6-09fe-465b-8c56-19e97d8dee02/spintires_full_game_download_utorren.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/74630346945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d84b56-043b-4bc2-8f63-37ce48d3da76/foundations_of_earth_science_6th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/james_biden_iraq_contract_snopes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa34b27-bd48-408f-9bfe-cab65fa1d759/46853657360.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EA 5032 bytes
SHA-256: f304230a1f8b2518064ef27f388a05b2644be41ebcd8398d33236ae2e2f693fe
font_01_sfnt_off0000c625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC625 10068 bytes
SHA-256: 2eef638064281bfd09dcf53beac6a6251d1df56a45a711f18bbd04714db84223
font_02_sfnt_off0000e8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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