Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a9425cf8a93ec7…

MALICIOUS

PDF

69.8 KB Created: 2021-01-21 09:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d23629e7cc422bf78360c7bafd7c1718 SHA-1: 9b7e074e58810bcb102b9302dc5c9c75e751510b SHA-256: 91a9425cf8a93ec7e742fa76269b6d169c28ad4a3b9ae756b37e5dd341ad459d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?utm_term=aviary+vet+near+me In PDF document text
    • https://static.s123-cdn-static.com/uploads/4461777/normal_5feb9fc254cbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5fac285821333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f909ee5c40b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fcc5fceb3567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_6000c0f1ef9e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378164/normal_5fc7ff9869973.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/marimejerebo/94238676946.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/xixuvetixogilijodevurigon.pdfIn PDF document text
    • http://tuxusar.epizy.com/gaming_computer_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/kidnap_bengali_film_all_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/53164429567.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/kalefaxutatolavuge.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/36108852702.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/powerpoint_cv_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/workplace_risk_assessment_form_nsw.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/24832202422.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/dopbnk_full_form.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_off0000d726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD726 4772 bytes
SHA-256: 810831659f793a81d00b8526861a40216870fcf47242b0b6ff343a8d2205bb21
font_01_sfnt_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 10292 bytes
SHA-256: 832b6c84b4b469882aeb8e57b03fdf36be8dd330db2154e3a31f9d5a6ae86cd6

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