Malicious PDF — malware analysis report

Static analysis result for SHA-256 700561d0a6ebc5fa…

MALICIOUS

PDF

78.2 KB Created: 2021-04-07 20:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de62f1301091dc72ebcece04f6f48b81 SHA-1: 43e49c1ce8a87eed89f8f696125847d28032b871 SHA-256: 700561d0a6ebc5fa0d1965cf3f984608d22f00b0e2d0f5ca756b8cd8d2d1ad81
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, a common social engineering tactic. ClamAV detection and ML classification confirm malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wix?keyword=tektopia+wiki+download
    • http://shmelev.pro/tugaloziz0h9es.pdf
    • http://f13x.xyz/wetibororikexapisawabon7a34.pdf
    • http://reduslimitalia.site/wudurokerinonih44f1.pdf
    • http://fugisipadizov.22web.org/aditya_hridayam_in_sanskrit.pdf
    • https://cdn.sqhk.co/lulufebexefe/Cbja7T6/17570361365.pdf
    • https://cdn.sqhk.co/tititafoza/VgihhUr/vesenivevivilipazulef.pdf
    • https://cdn.sqhk.co/nesuxozajek/ieigjii/riders_republic_gameplay.pdf
    • http://runmasten.online/90874393731rcvxe.pdf
    • https://famepakemujo.weebly.com/uploads/1/3/2/7/132740594/rufudovufebevum.pdf
    • https://cdn.sqhk.co/rasepotobami/gHgiafd/unicolor_steps_color_ball_jumpsuit.pdf
    • https://rokojilezel.weebly.com/uploads/1/3/2/3/132302907/jusotikawelow.pdf
    • http://musc-media.xyz/29751014936ix9zi.pdf
    • https://cdn.sqhk.co/manuguwe/zigXkhf/craftsman_building_craft_2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://abc5f1b3-ad37-4660-b048-d9bff2240d70.filesusr.com/ugd/a1fb68_640545667fde448ea08026b3a89273ad.pdf?index=true
    • http://lonozixugixapap.epizy.com/demonology_warlock_5._4._8_pvp_guide.pdf
    • http://gijafusatuvaxoj.rf.gd/55881198164.pdf
    • http://bupagaruwizuzu.epizy.com/calendar_ortodox_2020_printabil.pdf
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_1c1d61e90c7747f7ad1f38716638d325.pdf?index=true
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e89a.bin
2cb06cf26f43ad1a744d161cbc5023d0ba4f7ea2cda5b7671a6b18df3161839c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE89A 4572 bytes
font_01_sfnt_off0000f846.bin
2a19b35df292c3ad91a9d251a41583610fa54f60c1b40dcb759ba0508cde6169		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF846 11052 bytes
font_02_sfnt_off00011e01.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E01 4324 bytes

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