Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8552ffd9b9c4e37…

MALICIOUS

PDF

69.0 KB Created: 2020-11-24 03:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1a2ce74a20467bc9b36472d5ffd0feb6 SHA-1: e7bf51934f953a9b00d2703e6f174d9cfbdb5b11 SHA-256: e8552ffd9b9c4e37b5a64e78494bd67066a4c9b5f56bd91979e466a090952171
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://trafficel.ru/aws?utm_term=tratamiento+h+pylori+2018+pdf', which is likely a phishing or malware distribution URL. The PDF structure and embedded content suggest it's designed to exploit user trust, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=tratamiento+h+pylori+2018+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/jomuzomopapu.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/liridipamagivi.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/shadowrun_5e_augmentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0137b9-8c3a-4865-92ac-90c2e69ff2ac/77503564380.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/corporate_tax_filing_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/17907021259.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/mass_of_a_joyful_heart_alleluia.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/ap_police_online_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/marantz_owners_manuals_free.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_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 5672 bytes
SHA-256: b259779af3cd45660b2499b8e872e8d919b5036ddb12df2db1def6546d71b9ab
font_01_sfnt_off0000e4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C9 10312 bytes
SHA-256: 54b872575ceeec2afaa6f3a43de7db0b0bf896e44687cc94bb1aa816c6327a69

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