Malicious PDF — malware analysis report

Static analysis result for SHA-256 485b7457c80438f2…

MALICIOUS

PDF

63.0 KB Created: 2020-12-31 03:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 101cb6a7718ac2768a00caca023b331c SHA-1: 9c8f237c2acfeded8d763abc1b9e0e7f73697ff5 SHA-256: 485b7457c80438f2eb742cf6afc550cabeaf96fab9e525d6d2c60c73729cce2b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://trafffe.ru/strik?utm_term=slices+saugerties+new+york', and another significant URL is 'https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/gaxoxexed_masaxovadebo.pdf'. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=slices+saugerties+new+york PDF link annotation
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/gaxoxexed_masaxovadebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5fadd68da8ab7.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiwurixiwo/jEfggwX/laser_quest_sunrise_closing.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/jid8xhc/ballinger_tx_weather_radar.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/d946ba60-f6b1-4650-8cca-b9a7293e7e2a/citizens_spigot_1.8_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/rijesozemafiwanezetetul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0a0dfe-f2f5-4224-ab46-28bd5f63fd3c/88889630023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a2c3c2-270b-4d07-a68d-a23803fb4398/sakumugisiveludenupupigub.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/43021596962.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/dragon_ball_theme_song_lyrics_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/gusib.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/best_pho_chicago_loop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68d09ec3-ad8c-4c1f-84f0-802977d23f09/98084361444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1f0aca-e0e4-4108-9922-7ec104a65ec9/60660220658.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_off0000bb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB79 5328 bytes
SHA-256: b7b3a23224a413f95d3e6e49b08d957a861d2ce250e2f271be6cdeb4e6d98598
font_01_sfnt_off0000cdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 9848 bytes
SHA-256: 836bcd045d1f9da6b15c93cb60baa76c32c832067e5b887532b2ca5ce31848a2

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