Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e23fb55113f9ed5…

MALICIOUS

PDF

85.2 KB Created: 2020-11-10 13:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 11869da1674f32f3acded5de2a1ed9d8 SHA-1: 9bed9c1dde6e71a48291891479ae3b9f04faec26 SHA-256: 1e23fb55113f9ed5ec36aa818d3d78b317114d2b29e73ff15776418c268afe8a
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?keyword=maplestory+bbb+3rd+job+questions PDF link annotation
    • https://dizawiwutap.weebly.com/uploads/1/3/4/6/134629961/pibupebidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_5f9e668e11d59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_5fa67160cd390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5f95c349a27af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5f8a6389d964d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8a0d0f632ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403688/normal_5f986d6427615.pdfIn PDF document text
    • https://sibinepenisux.weebly.com/uploads/1/3/4/4/134467302/c0bb57cb62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f8fe854c1420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fa645ca26da4.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/wukevirenesu/sutipejudirometekabonulim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a60f09f-5c3c-4c1c-84fd-c2830dab9420/39385479013.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/8th_grade_science_tests_with_answer_key.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_off00010ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA7 5564 bytes
SHA-256: faad3a9b6e07ea00808bfa12eb827b5083bcb4de38643e2ed9bc797252b65f7f
font_01_sfnt_off000121a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A9 11140 bytes
SHA-256: a78174f96d53cfae7299ae07051e03ba16dd9eff1267f0588ff0d5da70679dc3

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