Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e877fff0629977…

MALICIOUS

PDF

70.8 KB Created: 2020-12-20 03:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 46ce2ce004f0766abf79155ffb84b6af SHA-1: 18e498d6c9e2e7768b50d6453345053ab768657b SHA-256: b9e877fff0629977944d74ec28d3284d1fb6bb519b536b017b6a53f09d2d00e6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in phishing or SEO spam campaigns to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

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/strik?utm_term=ohsaa+basketball+tournament+2019+scores PDF link annotation
    • https://warajepij.weebly.com/uploads/1/3/4/6/134608856/5b8de.pdfIn PDF document text
    • https://dojumavuj.weebly.com/uploads/1/3/3/9/133997280/zogelis.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/5fc6b554d2523e4b70bcdb4b/t/5fc9940de4017829c1632482/1607046157905/total_conquest_mod_apk_download_link.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe22bb9ee0f32b871ccfd2/1606296252445/ozark_music_festival_lineup.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/curious_incident_of_the_dog_in_the_nighttime_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18bf4e89-c8f4-45f3-b165-83680517887f/2001190332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1acb37-1e93-4eef-84bf-23a29e623d93/xipelexesagapigaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33dca028-be4e-43ba-887a-b8390992e764/korisuvemelulefapoporug.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/bozasovuvibe.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/74807443378.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf518861e25426e12f4b4e/1606373769616/daewoo_dsl_601_service_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc552d70a2757459b004032/t/5fc680102dd96f5918ce9710/1606844433976/voodoo_needle_magic_trick_tutorial.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d00e405d5340f3291e5b/t/5fc275fdf81c9a2a0cf193d0/1606579710134/tetipuv.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_off0000d65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65B 5752 bytes
SHA-256: 96c82d4a2fe044a2e2617c32ec55cf9b2a80fd9742d6e76424bf19f82e286223
font_01_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 10824 bytes
SHA-256: 904b369d4d300765f39bf9ad80a798dbe8135c642b46bc840acf95373e6d2804

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