Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b2b33c73a45660…

MALICIOUS

PDF

98.2 KB Created: 2021-02-28 01:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 50ab42b8f834e3eae7d82e1fe8c8d8ad SHA-1: 70c4d6b69e299c69f217733f4b509a6fa2661016 SHA-256: 93b2b33c73a456600a5a6a626bd8546f7b92a8693b84867984a5f96d9b388b56
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to documents with SEO-like titles, suggesting a link farm or SEO poisoning tactic. The primary URL, https://soxebez.ru/award?keyword=feudalism+and+manorialism+worksheet+answers, indicates a lure to a website that likely hosts malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=feudalism+and+manorialism+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467593/normal_5ffa613c0d34e.pdfIn PDF document text
    • http://prizinsta365.online/sony_cybershot_rx10_iv_manualnitil.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/mawazojidoxasazesa.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/axis_mutual_fund_common_transaction_forme2d4p.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/mojod.pdfIn PDF document text
    • http://espaceclient-cmb.com/jidapisabogikezakidibespepm7.pdfIn PDF document text
    • https://tojejalunegod.weebly.com/uploads/1/3/2/7/132710717/40575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5fd0ed271d963.pdfIn PDF document text
    • http://medway24.com/271999194qjs80.pdfIn PDF document text
    • https://tixovokibena.weebly.com/uploads/1/3/4/1/134109053/jisaviruli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420905/normal_60084d1227ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_602dd03fbc31c.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/dejazuvorira/piriformis_muscle_running.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/77713953792.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/remove_duplicate_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/tiruwalaxotovidafebu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/82117865086.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/xafuboluluwanerug.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/past_perfect_simple_and_continuous_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/electronically_stored_information_discovery.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_off00013616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13616 3088 bytes
SHA-256: 16d654a87c668f6bcf6b98bfc52203bbe1168ed1a8af92f7808ddd669486e560
font_01_sfnt_off0001412d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1412D 5176 bytes
SHA-256: 8c9e822f60ee9e4b781a3c29bc70567e3b1d20d514796b897326a3bfe32a0bdc
font_02_sfnt_off000152ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152AC 11232 bytes
SHA-256: e0a58cb2064b1d9eaa46a99e10368f5c85e16ca16daa7b54e57dbd183866730d

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