Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd6e206f32b1100…

MALICIOUS

PDF

65.1 KB Created: 2020-12-19 11:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dd28048bca25d44caee8e96e0d281ff9 SHA-1: dc8608be0586b71d12ac2c818b3c4dee5a6f7fed SHA-256: 7cd6e206f32b1100502f629da3ecf6802423273530f32251f8eafea9de6188e6
222 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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?utm_term=how+to+add+beatmaps+to+osu In PDF document text
    • https://xiwapidijiz.weebly.com/uploads/1/3/4/5/134511693/logovido.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/gumini-defitejawupo.pdfIn PDF document text
    • https://sukorajonivo.weebly.com/uploads/1/3/4/1/134108587/5717811.pdfIn PDF document text
    • https://rovoxidavawes.weebly.com/uploads/1/3/4/5/134584131/876302.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/5fdcb81cb919dd0c3e451148/t/5fdcf35e89f74a08def6d1d1/1608315744786/bittorrent_setup_free_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8a0e3d-3cd8-442c-a2d9-4442bc935d7c/student_council_poster_template_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53a9d116eb00e3c685617/t/5fc7d2628927470b95c7c77e/1606931046946/soguxetulet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b373042-44ff-4ede-9b60-d5e63525edfb/a_letter_to_three_wives_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/36164495497.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b65d6609fd0ee7b27781/t/5fd62252102ca46975db185c/1607869010756/gudelirifotowemugodutepa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3978f60f2895dc1f8b122/t/5fd08c84fc93c51d16e0f184/1607502981347/battle_angel_anime_movie_english_dubbed.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_off0000c326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC326 5168 bytes
SHA-256: 2b8d02793da1e01a09682800c6ff506f4ea5aa7eee2a7698c10afaa7c4b81f11
font_01_sfnt_off0000d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 10344 bytes
SHA-256: e2ff99e2017dee51cbd20ba3b4d1f0905d58b1d76f361a46d44008292abfc34a

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