Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e615e298542720…

MALICIOUS

PDF

110.8 KB Created: 2020-11-25 05:47:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ff83b8b0c4da9fc19700442a909aea6d SHA-1: c8445f540aa1ec30f364baa87c7922285029391c SHA-256: c4e615e298542720cf504239ce844b2f71edd788d6feeb359b192b246e3f3aec
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://traffnew.ru/123?utm_term=great+green+macaw+sound', which is likely used to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=great+green+macaw+sound PDF link annotation
    • https://nipibodofabujid.weebly.com/uploads/1/3/4/2/134265940/nosipexex.pdfIn PDF document text
    • https://galafibokuwi.weebly.com/uploads/1/3/4/8/134868726/pubinofus.pdfIn PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/bopororap_kawovemugev_malukit.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jasamejug-jenutuzudemeluf.pdfIn PDF document text
    • https://lesuwigiwojan.weebly.com/uploads/1/3/4/3/134309114/disur.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/ab222114-aad5-4a27-88d0-0043595666d7/subnautica_resources_respawn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b597ab9c-3ba2-45f9-ad3f-75c68cc23e21/busofelivugafizetigapivew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad12fd8-82c3-4bee-b1e0-ef32adab3989/89243958035.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/90932270195.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/valivogubojegonejidawaveg.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/dirowamipugopugebem.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_off00015b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B02 4664 bytes
SHA-256: f3351b7e97451bb0dda0df6f8d9093abf87ef907c27a01eb5aabe980669b8a0a
font_01_sfnt_off00016b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B47 5352 bytes
SHA-256: 492dd86747d2cae275fded71e1c1c3cdbed08a9426edcecdee356d8b648d3289
font_02_sfnt_off00017d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D76 16172 bytes
SHA-256: 8bad12f33a070510d2f76eab7183bec3009fc247dce4d9aaf619520a102dd5a6

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