Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f95f6c07bcad947…

MALICIOUS

PDF

66.7 KB Created: 2020-12-13 14:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8f77f4f2859c1914ba7abb0a09823b3f SHA-1: d4ddcdbd63666f898b3a57bc64bd11d2520de433 SHA-256: 4f95f6c07bcad947f3d2988be7719bb7f9c1a59413d8d77e860d0f6ee262b78b
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+to+make+thermal+night+vision+goggles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411681/normal_5fad2d64d7537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5fa4108ac5159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_5fd391674f649.pdfIn PDF document text
    • https://wipaluxeko.weebly.com/uploads/1/3/4/3/134346688/8003634.pdfIn PDF document text
    • https://buwolerujagelav.weebly.com/uploads/1/3/4/5/134580081/zotojogokijakokoda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_5fc02ca62312b.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/tugumeb/78261875339.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/94487083915.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/angel_wing_begonia_flower_information.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/60548925473.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/abstract_noun_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/actron_pocketscan_plus_cp9410_manual.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_off0000c96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96D 5276 bytes
SHA-256: a2fd384c7c733fba46b50805e6bd8e77eefec2af6ad4c9a8c9ae10dda51f4c57
font_01_sfnt_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 10144 bytes
SHA-256: 5682168f22c95a2f3f62f8c71c89882ec98b3217328399c741d15c36a98169ad

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