Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb6ebcdd6346d4c…

MALICIOUS

PDF

69.0 KB Created: 2020-11-14 02:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 45fdaee3bdb09fd6be39bff4f557df5b SHA-1: 0151cf22b4feabbf792673ad348edff65a8137e4 SHA-256: fbb6ebcdd6346d4c069f3c1d5a881ac57786030f39522eac47f168dc5e912c6d
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one pointing to 'traffnew.ru', suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to redirect users to potentially harmful external content.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?utm_term=discord+markdown+color+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f9a89c1537d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413735/normal_5fa5b09266b7c.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/wuwigobire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8b7b5f3b702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_5f8af71929e06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_5fa63af73c368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_5f9e4249c927f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f91071ad6cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f89c6313565a.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/xanebavifamopez/prentice_hall_california_algebra_1_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/miller_middle_school_durango_colorado.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/79060527184.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/ps2_emulator_apk_download_for_android.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_off0000d3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 5240 bytes
SHA-256: 6202e0aadb237f69089cbb9f1c208dc695b474728fe329b68b31056c1036d190
font_01_sfnt_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 9852 bytes
SHA-256: 307c8ab4d714b573f86635abd46ba979ca9559cc3a5d297996e6db9571680ab5

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