Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5f9ab67fd24dbe…

MALICIOUS

PDF

67.0 KB Created: 2020-11-30 19:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 10d710a9dbb5ac67098377e1a733f817 SHA-1: d30c4fbc78c60cee5c39886bc1c82bbeeb20cb6a SHA-256: 9f5f9ab67fd24dbe90d857ffbfb6e88a0fb7b99787ffb16470ab8b249fd38bac
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 0.9997

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://trafffi.ru/123?utm_term=indulgence+nail+salon+%2526+spa+maineville+oh PDF link annotation
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/2a1e8a81a94ce7b.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/satedafadusizo/oecd_report_on_scottish_education_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/bill_nye_the_science_guy_plants_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf494cc750a3b5a055335/1606218901357/dugogowupo.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/37640380907.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0f06cc750a3b5a089f87/1606225672507/89317155833.pdfIn PDF document text
    • https://s3.amazonaws.com/rakonezum/watch_burn_notice_online_free_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b43e25-03ba-44a2-8b7e-1a6bfc228767/programacion_java_ejercicios.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/23510985.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf641ee18c5c478ef4010d/1606378527049/chess_puzzles_with_solutions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f186bda9c57a97be6d6b/t/5fc1bf113485235c8607c36c/1606532882065/vineland_high_school_mascot.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEE 4948 bytes
SHA-256: ff2648d4310c485a8ccb1ae5fafb09bd8061ad0172239675a325442b9c0e3a8e
font_01_sfnt_off0000dcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD6 10364 bytes
SHA-256: cebda2e5b534a94152a39d426582a12de5ca634241cae80383e8ef3f9e981394

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