Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fb17c067af4489…

MALICIOUS

PDF

81.7 KB Created: 2021-03-31 19:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da8ba191f56775b6742d6db327951e2e SHA-1: 6d5362a62bb6e03cad7f77572e90b021997e7c37 SHA-256: e8fb17c067af44893f1682afff4e32d6d55cb53723b95504c66054c03b2a9914
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-related, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL 'https://ponafet.ru/wix?keyword=amish+furniture+store+houston+tx' is likely part of a phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://ponafet.ru/wix?keyword=amish+furniture+store+houston+tx
    • https://cdn-cms.f-static.net/uploads/4387046/normal_6020b31e307bf.pdf
    • https://static.s123-cdn-static.com/uploads/4371247/normal_60070f3ce3c2d.pdf
    • https://cdn-cms.f-static.net/uploads/4387704/normal_602f851b718e1.pdf
    • https://cdn-cms.f-static.net/uploads/4415950/normal_604357a186d2a.pdf
    • https://cdn-cms.f-static.net/uploads/4472793/normal_6061a315e7e29.pdf
    • https://cdn-cms.f-static.net/uploads/4368741/normal_60405807a2e73.pdf
    • https://cdn-cms.f-static.net/uploads/4412606/normal_605dafa59291f.pdf
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5fd22040bfb03.pdf
    • https://cdn-cms.f-static.net/uploads/4483335/normal_6063b734ed61c.pdf
    • https://static.s123-cdn-static.com/uploads/4476302/normal_600367c32cd16.pdf
    • https://cdn-cms.f-static.net/uploads/4452612/normal_603b5b89e9346.pdf
    • https://cdn-cms.f-static.net/uploads/4495271/normal_5fe7668e3639d.pdf
    • https://static.s123-cdn-static.com/uploads/4383806/normal_5ff54648b66e6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_b1c6caac938e49e3ae4cf02244bc3568.pdf?index=true
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_2990a9ca392b49849b6180ee88738fda.pdf?index=true
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_921e3a24ca2c4f42b61d1b271e4dbc40.pdf?index=true
    • https://s3.amazonaws.com/fajetufekejo/vespa_px_125_performance_parts.pdf
    • https://s3.amazonaws.com/dovulavavo/62011663343.pdf
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_1d83569386f949d58998e50ee2a935de.pdf?index=true
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_4c179f2edac942e187717da5dea8e0d8.pdf?index=true
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_7c6d23f854a34496b093a0472daf2c88.pdf?index=true
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_61704e20f5434fa9904dcbfba4f5f30e.pdf?index=true
    • https://s3.amazonaws.com/vibuvomomuv/dish_network_tv_guide_tonight.pdf
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_96b0a8b7f3d24662ab8ff41f8a8caa2e.pdf?index=true
    • 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_off0001021f.bin
b9629a33f02edf7b943bad1f727f4132c15f4a14b0be5d2476619f07e88e9053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 4824 bytes
font_01_sfnt_off00011261.bin
1559298f1c0ec6e3c1e3ed22bb67543d3b5875575c37684948e171d29e0efc6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 11484 bytes

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