Malicious PDF — malware analysis report

Static analysis result for SHA-256 84766ea4aa33700b…

MALICIOUS

PDF

75.4 KB Created: 2021-03-22 00:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ad6d8f565e18753f017f1fa216250011 SHA-1: 70f4c0d818735876d15a2f581d8e757504334e45 SHA-256: 84766ea4aa33700b05e51afcc0043b214014e6be9b1e9a76a32bc9053a201428
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent URL pointing to a suspicious domain ('fokemale.ru') that is likely part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, further supporting malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=13+math+rules+that+expire PDF link annotation
    • http://fishland.store/how_to_make_book_jacket_designokig6.pdfIn PDF document text
    • https://cdn.sqhk.co/bubesuzax/cv3gijc/wifimasevijevox.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/47801480271ywwjl.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/84aQjjz/dominos_delivery_deals_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vuranataxu/cmie8xX/micro_machines_v3_download_pc.pdfIn PDF document text
    • http://216tilford.com/50369637597k23uj.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/bF1jboZ/download_game_stickman_revenge_2_mod_apk_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davepizu.rf.gd/duruxawoketovalefoda.pdfIn PDF document text
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_767274753caf4160b322a0908ce4d864.pdf?index=trueIn PDF document text
    • http://xedaxabefax.rf.gd/naximoxisemimekizat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd6722a-9cda-4a65-9136-98d9e9d4f4d4/tcp_ip_protocol_stack_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/21320132232.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/i_come_to_the_water_sheet_music.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_f75ae949f00e443993a7954c8e877e37.pdf?index=trueIn PDF document text
    • https://74f55dc1-c9a5-4be3-8cb6-5a41d2e6c5ca.filesusr.com/ugd/bacb18_8c2a04258f9e40d5bbfd81707fe8a33d.pdf?index=trueIn PDF document text
    • http://magotabitujotu.rf.gd/7250540320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7da480-1423-44e6-a10e-4cfd31e33af4/what_is_a_general_release_of_all_claims.pdfIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_a354947c43c841a79c74261c89c2bbee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/citing_mla_format_website_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46096ee8-704c-45e5-8b9c-abc390986f9a/28567651403.pdfIn PDF document text
    • https://93a2b5bb-aecd-41dc-861f-07dcdefec443.filesusr.com/ugd/dee83c_33b115117dc240399443d08a689b8134.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac491854-ac98-4e52-8da5-91576a83cd86/26679318033.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/90034846766.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_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 5248 bytes
SHA-256: 4c71aafa1f285a19933aeecd344b8d0a7eba7b38f61d6634b3716d931d6ba4e0
font_01_sfnt_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 11252 bytes
SHA-256: 1647cd5a98e868f502fb478a0e28d1c75df38e3666294fc3d94455b4520f8999