Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad51f44a30dc8a5b…

MALICIOUS

PDF

66.6 KB Created: 2020-12-03 15:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3f13c4d0033d66b5e867235f0be0323a SHA-1: c6326b2cf250b5c432226edfc7cb010237d6d43f SHA-256: ad51f44a30dc8a5b9792c676637a527fdc6e899eaaabd92843c08eb0265eb1d2
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with high confidence. Although the document body is heavily obfuscated, the presence of a malicious link and the ClamAV detection strongly suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gettraff.ru/aws?utm_term=cbse+class+10+english+guide+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5f8f38ede827a.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/9980fad4-4e82-48a1-8729-5caa33a6238b/topology_munkres_solutions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d57abd14ff0dd29c5223/t/5fc2b880645712565495d7f8/1606596737223/dugomogufekanerakez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59429b1ed03538d25007/1606375747168/garageband_export_file_formats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132e782b-4800-4279-910b-42beee93ae11/45525679058.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc556d5df132613bbdb1115/t/5fc62d48cb3e0f5771229a79/1606823240478/86576054463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cac4ac-e44e-40a8-a17b-b8a2d147a395/south_albany_high_school_mascot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c725bf-04f1-4dfe-a5af-a1a67013df68/diworevogugimusepiwowediw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ce110f-a125-4102-b961-229a396fabd2/66422696771.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e110403f5353fd95a22f/t/5fc4eed9fa04221c71ba8883/1606741721431/nuwakonuterojapono.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1a819d7936484056e87a/1606294145598/the_heir_kiera_cass.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2983b9955c744b5466208/t/5fc5c0fc173fb5383b6ac830/1606795516711/live_weather_radar_rochester_mn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9da87e7-6dc5-4357-b435-74e25530e091/femugadizidepadinu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/airpods_2_android_controls.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_off0000c873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC873 5560 bytes
SHA-256: 5c5fc80543342bb042a986525822e4e8e12645f0165c99a52ca2c1d3d06dd51b
font_01_sfnt_off0000db57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB57 10152 bytes
SHA-256: 18cd591655be9232ec260753b295e87d45d1d2299800c24c2040201974bea890

Open this report in the interactive analyzer, or submit your own file for analysis.