Malicious PDF — malware analysis report

Static analysis result for SHA-256 3639bd150005aed6…

MALICIOUS

PDF

78.0 KB Created: 2021-03-21 12:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53c432cc39d01053699288badbf8c110 SHA-1: 82de611f5dec520ba36562a03317eb4c3ff0862d SHA-256: 3639bd150005aed657b55a9bfc5a5a9e3f4b606a2086d213d02f561b4adde149
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=catalogo+price+shoes+confort+2020+pdf
    • https://cdn-cms.f-static.net/uploads/4494868/normal_5fdb155be8065.pdf
    • https://cdn-cms.f-static.net/uploads/4491412/normal_602318892387f.pdf
    • https://cdn-cms.f-static.net/uploads/4378628/normal_60318649d3d03.pdf
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5ffbe73280736.pdf
    • https://static.s123-cdn-static.com/uploads/4393016/normal_5ffe99132bffc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_40d030b911b94e589b19f339afef67b7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/309453bd-c49d-40aa-ba5f-984975de1cb3/bapixaredor.pdf
    • https://s3.amazonaws.com/lijopavexanuse/xolifobukogageza.pdf
    • http://xosumuzav.epizy.com/yakushima_hiking_guide.pdf
    • https://uploads.strikinglycdn.com/files/38bf362d-b11d-42b4-850a-4a2711a99ed7/what_is_aggregate_capacity_planning.pdf
    • https://s3.amazonaws.com/fevobelijogal/vigukobefatemogubu.pdf
    • http://tugoxejemikoze.epizy.com/gowujagijubewijubafimetux.pdf
    • https://s3.amazonaws.com/gadumagabusodel/19596217170.pdf
    • https://uploads.strikinglycdn.com/files/2e5d043e-dfde-417b-9e67-1891bd256e8f/is_lg_linear_compressor_good.pdf
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_994bebfc161c4bba9ac8755e527e0993.pdf?index=true
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_aad5bc1182e34ad886b4221de4d33acb.pdf?index=true
    • https://s3.amazonaws.com/dorobukasawituw/any_video_converter_full_crack.pdf
    • https://uploads.strikinglycdn.com/files/13cbc04b-08cf-4ae6-b5a1-12daa4529250/mechanic_check_used_car_before_buying.pdf
    • https://s3.amazonaws.com/dukexajuj/gatech_mechanical_engineering_career_fair.pdf
    • http://baverasoge.epizy.com/bulletstorm_full_clip_edition_platinum_guide.pdf
    • https://s3.amazonaws.com/lukepepe/kororapelix.pdf
    • https://s3.amazonaws.com/dudujopixejikug/pajavivove.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b7.bin
b34957b1982b29819ace9cdec54cddc8afde8a0c588c155dbd445efadfe7f1b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 5596 bytes
font_01_sfnt_off0000eab9.bin
ad83c44e4654863035bb2cfb7d8d8bae71a67d59cf78a5ce1fa48a306b9af682		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 11788 bytes
font_02_sfnt_off00011139.bin
7df00124c24cc8997af875c9c45d72150844caee9b0983527e79e03e4e096de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11139 16580 bytes

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