Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cbd85559f1befe…

MALICIOUS

PDF

77.3 KB Created: 2021-03-28 18:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 210d540169e95b1227e5eb96812ab243 SHA-1: bc5e97ced6e24a2a61c88960cccf107ed4d94760 SHA-256: 94cbd85559f1befe1fde90cc49e51b9e45611821a86840a2bb0bf1a67b748c67
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The primary URL, 'https://soxebez.ru/strik?utm_term=what+are+the+ethical+concerns+of+gene+therapy', suggests a potential phishing or SEO manipulation tactic. The presence of ClamAV detection and a high ML classifier score further indicate malicious intent, likely for distributing further malware or leading users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=what+are+the+ethical+concerns+of+gene+therapy PDF link annotation
    • http://gajonedorebuko.mywebcommunity.org/53096919680.pdfIn PDF document text
    • https://cdn.sqhk.co/mofipife/bhiiiie/nufig.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/7igtNdL/pipijovafuwonusipalofe.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/cighPjj/ski_safari_2_mod_apk_ios.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/gojano.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/dipivixudekoziriderejinum.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/3HMXhhu/skins_and_pets_for_among_us_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/dNjazmB/84190540599.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/glacial_erosion_and_deposition.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/40009212614.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/90374aa8-0d58-4577-b08d-28ab22f864be/ipod_nano_3th_generation_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c25d99-1778-4b53-ae12-186f454150a4/vegixolarabosapaxulumumu.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_ff8b312625b44c9c915345e9f73926c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d42bc4a-a8bc-4abc-8965-3d6fa8d50fe1/unbearable_lightness_of_being_castellano.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_a445a310f50f498a974900d64e7a5b59.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95789f83-f063-49bb-85a5-5bd7bbbb9b31/xamagadikutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a99aac-319a-41ab-b52b-1eef9c742be6/32378806194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c18734-4684-45b7-8515-a5dcf490ebc8/53213808614.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_e934a0d6ab674fb18c329f349150630d.pdf?index=trueIn 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_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 5392 bytes
SHA-256: 138ca4258030456fdf0ae01660b187b63c3b2513ed4b9cd363ec78f0a549fcac
font_01_sfnt_off0000ffef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEF 11924 bytes
SHA-256: c454167963c56d4604055608c3b90c74190468ae7247d068657367f073e8f9eb

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