Malicious PDF — malware analysis report

Static analysis result for SHA-256 970d8baca4582aff…

MALICIOUS

PDF

176.8 KB Created: 2021-04-02 23:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 583a6853a547f3571e99fef1cbd997bb SHA-1: 78dce5b152e81a7fd494103645eeef2eee3454f3 SHA-256: 970d8baca4582aff177d7e156fd793b68bcb5ce0c370f8351989078ed052bac7
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the ML classifier flagging it as malicious. The document body, though heavily obfuscated, contains text related to 'Merchants of Venice' and the authoring application, suggesting a lure. The primary malicious indicator is the redirection to the 'seumenha.ru' domain, likely intended to host phishing content or a further payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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://seumenha.ru/strik?utm_term=merchants+of+venice+book PDF link annotation
    • http://openplafond.xyz/38976497293gokwb.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/33705838480.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/21121620947.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/9hbigo9/71806850751.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/aicJFjb/2897426714.pdfIn PDF document text
    • http://akvatehnika74.ru/definition_of_protected_health_information_45_cfrnmlwn.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/x9rDihM/space_blanket_survival_bag.pdfIn PDF document text
    • http://mybiol.site/zalebodanetorisilefoso4e3my.pdfIn PDF document text
    • http://nefupanono.mygamesonline.org/rti_amendment_bill_2020.pdfIn PDF document text
    • http://dogusiwimukames.iblogger.org/crystal_oscillator_design.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/Zjiihge/ding_tea_ann_arbor_ann_arbor_mi.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/18395827533.pdfIn PDF document text
    • http://medtechnika1.ru/is_tummo_meditation_realk3vst.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/ibhdbYH/bowling_3d_strike_free_online_game.pdfIn PDF document text
    • http://csxmoney.info/69444073753l3wj.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/c4129fbd-9374-4893-80e1-5abf08d3cdc6/98725100018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c100af-350c-497f-ad8b-b56d751f149d/janiditanidisubegaferujog.pdfIn PDF document text
    • http://nulepavujuzafo.epizy.com/97510219916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46f28cf9-7349-4ba3-a4f0-40850da16163/42416628554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f371ee-18ef-4c0c-afeb-50b5e957d5c8/30303058631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c769b105-6edf-4322-be86-0e1cf35b68b4/motion_light_stays_on_when_cold.pdfIn PDF document text
    • http://velododitimof.rf.gd/clear_cache_di_android_oreo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457b49da-7ad9-4dea-80c0-a11db212955c/full_motion_tv_wall_mount_walmart_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e326986-56a1-40f5-a5f8-fd3075e02491/what_does_estj_mean_in_a_personality_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c17498c-eccf-4521-9495-6567e623a4c4/widejutafikap.pdfIn PDF document text
    • http://kenumubozejofum.epizy.com/523325649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d96402-7fbc-473e-b09a-136ab0df495b/26173052179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e55b1ee-58f8-4d34-ad57-6bd050c8f7f4/how_long_does_it_take_to_prepare_for_frm.pdfIn PDF document text
    • http://vixadit.rf.gd/vavekevisozine.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_off00027fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27FDF 5204 bytes
SHA-256: c566747b97dfe725e7c4f8f6d4d938441887f7cf3e0e36bfb999ef4f8be99217
font_01_sfnt_off000291a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x291A7 10336 bytes
SHA-256: a3bed73ec7c63596ef91e42f2bc60a82d8e8f626d7bec751a7e475d8b16fea76