Malicious PDF — malware analysis report

Static analysis result for SHA-256 9939d561d8b2d874…

MALICIOUS

PDF

65.6 KB Created: 2020-12-23 02:31:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 05e02d8fb4ad365087b5b1f87117790a SHA-1: b5d68a2991e8ce88c4fd88fbaa7259cb93dbb31c SHA-256: 9939d561d8b2d87485d6271799426d6f16b5f21c632418e2746b1b42de4328ec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to potentially malicious domains, and the document body, though corrupted, suggests a lure related to downloading media. The presence of embedded URIs and a link farm indicates an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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://traffine.ru/strik?utm_term=cartoon+video+song+download+bestwap+mp3 PDF link annotation
    • https://zatetemaf.weebly.com/uploads/1/3/4/4/134494585/a49692547.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420905/normal_5fe2723af38e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5fb73d496b291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464323/normal_5fbac71ed2914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5f9352dfb9fde.pdfIn PDF document text
    • https://wadezadoli.weebly.com/uploads/1/3/0/9/130970015/7076579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fa22da676a56.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/1bafb457-a128-48cd-aca8-3c2b6919de75/the_censors_luisa_valenzuela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdce97a5-b418-416e-8427-22cad162914d/93638950310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c1768c-9753-425e-bdfe-d57e00ad3cfe/robert_lang_origami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc3f805-43af-4de0-a3f4-833f687fce9d/download_plex.apk_for_oculus_quest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc995aed-d15e-4ad5-8cbe-669fe26ab050/zosavijadow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/183324b2-fd73-46b6-b5b3-d96aef6377e2/430506581.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc280b3405d5340f333d31f/t/5fc7160b3ac9c763f4cfade7/1606882831883/offline_music_app_for_iphone_8.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_off0000c5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CC 5640 bytes
SHA-256: 62736d21c89254aee9ce10a1e04341a07359c0f7f40b6c142f74cdf6e7e341b9
font_01_sfnt_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 9584 bytes
SHA-256: 97d58b295afaec56677675e1505732416cb00fbe2e7e4c256da821dd2b0e9601

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