Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd8eb8aecb87d05…

MALICIOUS

PDF

80.4 KB Created: 2021-01-01 17:14:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 625c918a02b27ddaafd0167d23f08eee SHA-1: 7075cbc5801c3d9d599e438ee98ba139045b76ca SHA-256: bfd8eb8aecb87d05193c9eb920633ba97b669b0b88c667ea8c56884af436812a
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=pid+simulator+app In PDF document text
    • https://cdn.sqhk.co/renapudovi/j13Kiea/2313173259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5f9ab38be8bc6.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/igijdgf/sprint_nextel_corp_stock_price_history.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e23dbd-e1fc-4758-a33d-efc9c9a91678/40646852657.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/hip_pain_exercises_arthritis_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/xezasenapatixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08262c5-40ff-4594-b063-cbb324d5be28/oreo_8_icon_pack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/14th_finance_commission_report_vision_ias.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/36003279047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4825f8-09c7-4443-adf6-c45fddc783d3/descargar_pasion_de_gavilanes_comple.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/fegawudeteba.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/genoma.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11A 5104 bytes
SHA-256: 6147fc7328d18d855b7dfd53b836c8bddeb95f3fd361e3fa70dcebfaafe713cd
font_01_sfnt_off0000f257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 11084 bytes
SHA-256: 4d02cb5c1e7c1ab4d69827d82a518407a57b05c2c24dc94080d4b6b71a3780b0
font_02_sfnt_off00011859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11859 18316 bytes
SHA-256: c8cf10d5c0b6c01e550daf4700d4166662427abb8512a8da0435d443f98c0259

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