Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19043ac6143ffd2…

MALICIOUS

PDF

80.9 KB Created: 2021-01-02 07:56:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 119ba13dece3df8d50b3096deebcfd91 SHA-1: 93cd101289773fe6a5306642fe6de479e5e0e75b SHA-256: a19043ac6143ffd29757dbd20b96f4766ca0b280c8c7382f5ed71136624d8bcb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'Baptist church covenant'. The presence of embedded URLs indicates an attempt to redirect the user to potentially harmful external sites.

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://trafffi.ru/123?utm_term=baptist+church+covenant+with+scriptures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413719/normal_5fb880239389c.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/zodimepelutol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383467/normal_5fe4f09178c0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416304/normal_5fee9831d6e0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5fece5d12f815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fefef0784208.pdfIn PDF document text
    • https://jopepikenaz.weebly.com/uploads/1/3/4/6/134652119/rafavozaduwuvo.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/25083b94-3eaa-49ec-8ea4-9350943e1d16/kurasagupizunaximoruzal.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/birthday_video_background_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d095883d-6acc-44f7-95a1-bce402d6fd3e/51863090336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef5ad74-09ef-487d-947a-211633a57e4d/71586879001.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/geometry_dash_hacks_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/fizigamizowize.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/antivirus_software_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/valogosaz.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_off0000ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5F 5192 bytes
SHA-256: 8f8de6a2e13602e99eb04c444cccd15ce20fde8870537059084febcf838d7726
font_01_sfnt_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 10388 bytes
SHA-256: 64071661a1748bf6e1e66e6f22de187d78259351249efb99048e7199a4d4d583

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