Malicious PDF — malware analysis report

Static analysis result for SHA-256 252ac4be7177a5ed…

MALICIOUS

PDF

71.7 KB Created: 2021-02-21 12:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2dd6e82400192d3c495cb7d61c54c79f SHA-1: f709dd7d93c40361db62704fdc4d587dd53b0b5d SHA-256: 252ac4be7177a5ed3356847b316492930af01b623bb7ef0a82a031ca8b6717c3
222 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://yafferge.ru/wix?keyword=caltrans+travel+and+expense+claims+guidelines+for+consultants In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5ff88d378b578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_6013865e3aa5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407069/normal_5feafbf4a78cd.pdfIn PDF document text
    • http://kipigonatusa.iblogger.org/category_management_procurement.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/robbery_bob_2_mod_apk_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5fd9ae6ea6e25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fff03833fe9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bekabugi.epizy.com/87692331883.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/64892111530.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/aprendizaje_significativo_minedu.pdfIn PDF document text
    • http://goguvero.epizy.com/call_of_duty_mobile_mod_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/essl_biometric_device_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/impossible_quiz_question_32_answer.pdfIn PDF document text
    • http://sugekix.rf.gd/sort_column_in_excel_sheet.pdfIn PDF document text
    • http://vizebafep.epizy.com/diteru.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/vibirunat.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/letegapejip.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/tevijiduwe.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/18843077557.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_off0000db11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 5508 bytes
SHA-256: c463b2f33ad15426956afa67a2e2ebe091e89e3bce135280a31d13e9a6ecdca3
font_01_sfnt_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 10180 bytes
SHA-256: c2d908f6fd212ceb5faf8a0468e545343022a799aa568e90f28e6aaf63eb12cc