Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ef756bf8903eb2…

MALICIOUS

PDF

74.7 KB Created: 2020-11-29 21:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: f9f943528b2ab476819a8b64aac3ab9b SHA-1: 511625815a8ae18ee5a29cf6aa2c54f89e359491 SHA-256: 26ef756bf8903eb2f6cd5d10c22bdd348e4affc74bf547884723efd971533e2f
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM'. The primary URL, 'https://traffset.ru/123?utm_term=warrior+golf+balls+compression', suggests a potential phishing or scam attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing the malicious classification. Although no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection strongly indicate a 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://traffset.ru/123?utm_term=warrior+golf+balls+compression PDF link annotation
    • https://gisoxesasolide.weebly.com/uploads/1/3/4/5/134590405/vojegibikukap.pdfIn PDF document text
    • https://surafevigenirax.weebly.com/uploads/1/3/4/6/134610600/gojilijozinisa.pdfIn PDF document text
    • https://gekitudijelal.weebly.com/uploads/1/3/4/2/134265938/mogedu-sejum.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/95db1.pdfIn PDF document text
    • https://sowosevutab.weebly.com/uploads/1/3/4/3/134311467/sopufos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/final_fantasy_9_apk_obb_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d4f892-012c-450c-99e5-7ae2d3696041/xogarinupenimusab.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/nikon_manual_viewer_2_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af14efb7-9cb7-41da-9df9-31e83ec8c08d/sisofivu.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/54696986714.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_off0000e780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE780 5488 bytes
SHA-256: 9f09afbedc840c644a9ab2c01f6512231a8a60752b5158d28ca37da0e4439537
font_01_sfnt_off0000fa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA28 10624 bytes
SHA-256: 7d26ff564f997bb1cfc9f677a4d2776061549abdcfbf6428cc853b7ba16d7b4d

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