Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f33b0c632d8507…

MALICIOUS

PDF

62.8 KB Created: 2020-12-05 20:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 23bc959f57f8b819034060e15e62e33a SHA-1: e8e32ec5648877b0a8957dc1ed9dfea94585fb44 SHA-256: e1f33b0c632d8507853dcaa000d5c6ab531879eee08200d63ef99759774dfd3d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a link disguised as a wallpaper download, which redirects to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded malicious redirector suggest an attempt to lure users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/aws?utm_term=superhero+wallpapers+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f874214aa448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_5fad84a0bfdfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382976/normal_5fc59b081434d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_5fb9663a340a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2ce745e8e827d429a49c0/t/5fc764cc93ad1a48121b6fa4/1606902988989/virtual_girlfriend_simulator.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/wadoxakowogisuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16491a74-170d-4fc4-af01-86f05df0b505/7456020864.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0c2eec0a1d2b4e57c466/1606224942775/wekig.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef2c3485235c868a5655/1606283053290/snowflakes_falling_all_over_town.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/arrl_logo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeefa1972c46e3c642a30/1606283002781/95246243846.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe389e5147b14804fe4261/1606301870261/paxowila.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 4

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_off0000b60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60F 5296 bytes
SHA-256: fbaef3dd938606eeef4ab427643007e28751abd0848ecb69e9a3b29a7185b2fb
font_01_sfnt_off0000c824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC824 10852 bytes
SHA-256: 18450636d186c119ef6368d3df1820f244bf8e09d85ff53aea99c5a1295b5bf5

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