Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a686394a3a3f071…

MALICIOUS

PDF

70.4 KB Created: 2021-01-18 18:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d7068bf3d41c4316d7b2136676b4b6cc SHA-1: 3d50f5142d517980ae9617cefe15de837ef20be8 SHA-256: 4a686394a3a3f0716af2a4b36a9eb60ee0a59330fc3973c5d998f884290777bc
214 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 and routes users through malicious redirector infrastructure. 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
  • 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.
  • 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://gettraff.ru/aws?utm_term=notepad+format+json+2018 In PDF document text
    • http://ruroraratotu.66ghz.com/baked_sheet_pan_chicken_tenders.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5fd63a7a0d65a.pdfIn PDF document text
    • https://site-1175130.mozfiles.com/files/1175130/49593489259.pdfIn PDF document text
    • https://fuwizugirizuj.weebly.com/uploads/1/3/4/6/134611345/fisevisozekaverukake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f9434a8e26b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_5fb9708f92577.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenulozamaberur.epizy.com/kosotefodunibaxezesi.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/38758680466.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/download_ps3_games_for_free_on_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/nikuluxar.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/spatial_frequency_filtering.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/gtu_de_2b_report_format.pdfIn PDF document text
    • http://gabamad.epizy.com/donomidu.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/13858368197.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/13200835854.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_off0000d32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32C 5720 bytes
SHA-256: 9ae3f7a9062b50c9546841beee9b3deb6067624b5af955c77df17065e63dc9cd
font_01_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 11252 bytes
SHA-256: 60fec869e86f6fb6ad3db636188a980783ec45c85330867c09101bba42d68d38

Open this report in the interactive analyzer, or submit your own file for analysis.