Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fd70bfad624cef…

MALICIOUS

PDF

86.4 KB Created: 2020-11-24 08:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b7676b23fe57fe8636cbe9da22cdb4d5 SHA-1: d97cbafd1f20f1326d7e6b1e57cf5399eaf6b96b SHA-256: f8fd70bfad624cef9d4b2df1cd48e06f9180157ebf81549998e7493b9cde0166
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=cs+1.6+iceworld+indir+gezginler In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_5f8fcfe364f5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5fb47d2453639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493881/normal_5fada28e511a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_5fb2800a95bb1.pdfIn PDF document text
    • https://wefanisobepefib.weebly.com/uploads/1/3/4/4/134472283/baxiledegavidob-zanadimude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407782/normal_5faf8eda407e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f89e5093f8a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_5fbc9fc577f31.pdfIn PDF document text
    • https://wadagubabu.weebly.com/uploads/1/3/4/7/134709622/9353671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f9de83dc7a75.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/5515db1c-03f7-4816-869b-979acdd1f559/inflow_inventory_3.5_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2586332-eca9-4b21-b89a-46af7eeab5a8/8974541568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65de9b4f-95c6-4af1-b5b6-9aef869e28ec/51354477391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac599db-4b9c-4d3f-be13-44735474781f/zasavateko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e1a5d7-c729-470f-bcca-e78f8df89aba/dunuzuna.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 5184 bytes
SHA-256: 4bac00187a0a7be5ee365c2b973807231bf5280d4e5607880487e7e69b03cd5a
font_01_sfnt_off00010db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB8 13628 bytes
SHA-256: 24edba5b27b644194a991f9558ba81219a7fc94f45a8193bbec4e32da0e93a57
font_02_sfnt_off00013723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13723 16148 bytes
SHA-256: ad0c708b460e618ce6aa1ae58c119abe0059a1a7c018e8deefe984fca603a68d

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