Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98a68d248b63f3a…

MALICIOUS

PDF

78.8 KB Created: 2021-05-29 07:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 15d50323a5f7e5dd66d669edd1c1368b SHA-1: e471d6a261a6356bad2c77ab164d02a80e224a55 SHA-256: f98a68d248b63f3ade3221d74f82150f72a28a81809a7387a576673e75207734
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/123?utm_term=candida+diet+foods+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471106/normal_5fda7a51393eb.pdfIn PDF document text
    • https://lekinowi.weebly.com/uploads/1/3/4/4/134476644/wedatibe_likazilab_nananidizusu_mixozonamagewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_603e495af2d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_600f4c24b635a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_602b50c56a988.pdfIn PDF document text
    • https://kitetunevoneg.weebly.com/uploads/1/3/4/7/134703129/lelatotuv-kinulituwif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_606a9afe003a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446492/normal_60608cdf4376a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5ff0c96b18220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_603f4a90cbd31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_604fb8f44a366.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/sajixez_gefuwavubobu_dolenupimi_votiwebubit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_604766d4b88cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_60607f0010b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_60135e8f7b9a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5fce4f002227a.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/dbc67d76-2d9e-4987-8aa6-d01f14aad213/stone_soup_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7090d81c-ab62-4964-8f90-3fd1a88527ec/zapuxitugomeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a74e4f8-f3b7-4131-8f66-6e0e2d26d98d/vietnamese_guerrilla_warfare_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53bf15d-e3d6-4ab7-adbe-4c572f90df3c/kuzasefatipetikija.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 4812 bytes
SHA-256: 50a81ae726b70db2afaac63099147b7b11ea78a58bcbe0357826aab22f16b275
font_01_sfnt_off00010ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 10428 bytes
SHA-256: bf9161b108d4afaa172926e7c72c94e4bd30290d869f5d228430dd585258cb93

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