Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f4ab2561d4b330…

MALICIOUS

PDF

72.4 KB Created: 2021-02-14 21:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c46a34be17c906517a3131b3f0da89d6 SHA-1: 856adc67d7f613d6e171369129070cfa895453e8 SHA-256: 18f4ab2561d4b3308ef8ce10213209324c132fa2586671fdecd72e1d6956f63d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://maypoin.ru/wix?keyword=ps+207+early+childhood+center', which is likely a phishing lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the malicious URL strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=ps+207+early+childhood+center
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/f1b5f5.pdf
    • https://static.s123-cdn-static.com/uploads/4366995/normal_5fede0d7c3688.pdf
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60187e2aa012a.pdf
    • https://cdn-cms.f-static.net/uploads/4493549/normal_601da3d799e57.pdf
    • https://pezibife.weebly.com/uploads/1/3/4/3/134376528/ziponazunedujuxofege.pdf
    • https://kebuwusatame.weebly.com/uploads/1/3/5/3/135343151/pisopat.pdf
    • https://kivepuwepadile.weebly.com/uploads/1/3/4/3/134392404/2513433dd51.pdf
    • https://cdn-cms.f-static.net/uploads/4373987/normal_6016eb6bd2724.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jenulozamaberur.epizy.com/89576808014.pdf
    • https://s3.amazonaws.com/gujutavevive/reddit_best_online_android_games.pdf
    • https://s3.amazonaws.com/womirofop/mugepekojipoda.pdf
    • https://s3.amazonaws.com/luropiw/mojibodigotamubinob.pdf
    • https://s3.amazonaws.com/defipedibe/mumuraloruzexima.pdf
    • https://s3.amazonaws.com/piwupevivotixi/sqf_internal_audit_checklist_template.pdf
    • https://s3.amazonaws.com/nemafu/40932956191.pdf
    • https://s3.amazonaws.com/ditiruz/51051921186.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce5.bin
0e1118b6a15acb4c3e7f5f4293879cfb689770588c3cfd25b4258341f38a7d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE5 5484 bytes
font_01_sfnt_off0000ef94.bin
289a9b4d8af7e9315d56df9ad365227474d73c7e18daeaec0814d86460277aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 10960 bytes

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