Malicious PDF — malware analysis report

Static analysis result for SHA-256 a248638d141006a8…

MALICIOUS

PDF

73.6 KB Created: 2021-03-22 09:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 54d871b53c947a2710956c8cb5ecf989 SHA-1: 22a251473ef18edd966cb55482fbedfde0b6876b SHA-256: a248638d141006a8a8481f08c5cbff30f08f66d522c74ff3618c2019899659aa
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware-hosting site. The document body, though heavily obfuscated, appears to contain metadata related to the 'wkhtmltopdf' tool and a game title, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=aeons+end+legacy+vs+new+age PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371807/normal_600668f03d2f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487632/normal_6004717a33c2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446511/normal_601ec23b265f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_6032729cc0fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_6040fb11d9a75.pdfIn PDF document text
    • http://ladyso.ru/bonazawenexulobusexewurudq4am.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426971/normal_5fe1659b95676.pdfIn PDF document text
    • http://im-marceting.site/viking_village_fortnite_fortbyteq3k9w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_603c5298535e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386092/normal_60062e76865b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_c36d88ec571f4e4fabbe5f623c057b8f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvarelo/52702959544.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_90fea2ae684b4a21b631d671dde8d904.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/penale/xamowewupibepuz.pdfIn PDF document text
    • https://bed2724e-b6a4-42c6-a365-5b2dc6a82e2f.filesusr.com/ugd/9f087b_581f8e05c0554b2b9cbd677f65be9889.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_9b6519738ba742118b5ec8c6e143683e.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_f1cdb4227de84c8e8704be8f6c70db54.pdf?index=trueIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_4e62366c803b4a02820092dfc822142b.pdf?index=trueIn 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_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 5252 bytes
SHA-256: c897fc0abc99b6841492a128b64a60e1ab29c261476d97125d544853db12eb28
font_01_sfnt_off0000f307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF307 10892 bytes
SHA-256: ccc9e2098b9d479b1a3530bb70b4c10f37756c6aee66ba4f97d873da1dea454a

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