Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9baa2c04abe7ee…

MALICIOUS

PDF

72.9 KB Created: 2020-12-30 01:26:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 99e36fc3718d01a5f4f1f78ac899ebc6 SHA-1: 12ba53547fd9eba718ae46ea2de7e16f606c1bc7 SHA-256: 6c9baa2c04abe7ee777a2e26efd4ce5374a4e239ef3b6bfa4f9da6328e8e6557
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://traffnew.ru/strik?utm_term=rolling+stones+songs+list+alphabetical PDF link annotation
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/8a6898.pdfIn PDF document text
    • https://dugeditukuvil.weebly.com/uploads/1/3/4/7/134723955/veban_kesolav_tuberugexuzodaj_kitepi.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/19dc21a6-c735-425f-868e-940ed1e29902/millionaire_mindset.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/acrobat_reader_windows_7_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cbfdce9-a850-4cd3-a299-d0fd3b9883f7/47233280595.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/sewitabusebizewuranu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1ec2fe-6bd5-456d-93e8-00a37315a3a6/1321032205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14e78f4-8119-45de-9787-af5e085c899a/red_devil_cichlid_eggs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484d6d6d-825e-448b-aad7-6771b0af4b1f/40_year_anniversary_gift_modern.pdfIn PDF document text
    • https://s3.amazonaws.com/madegusulepugif/jacqueline_lawson_cards_sign_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1025989-1db6-4c9f-b47b-27168422e367/kurixowekokedukipomisam.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_off0000e0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 5248 bytes
SHA-256: 4b042e4445330dd5bcff99da80cf6c2c438a9f2dfa5ada7f2da6f9c295504316
font_01_sfnt_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 10640 bytes
SHA-256: 2d26b7689ab71fdbb5da97ae3a69d61d18e305c9bb4a1f08e09cf07c9273dece

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