Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce8ed619f2de9f9…

MALICIOUS

PDF

82.2 KB Created: 2021-04-08 22:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fcdf31a226d70b9802abb852e0cbae57 SHA-1: 8c53d1fc6e200e075ef780dfa8d9425a0ca1863f SHA-256: 6ce8ed619f2de9f985822db930ed3d7293632e4681de308969226c6d2993d42c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains, and one specific URL, 'https://resalured.ru/strik?utm_term=roland+r8+mk2+samples', is flagged as an external URI. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, strongly suggesting a phishing or malware distribution attempt.

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://resalured.ru/strik?utm_term=roland+r8+mk2+samples PDF link annotation
    • http://mezoterilijixa.22web.org/96147916641.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/jijhMjb/tatuda.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/diiPGIa/rope_ninja_game_download_apk.pdfIn PDF document text
    • http://soribowunalosu.22web.org/cfa_level_1_book_3.pdfIn PDF document text
    • http://zuvomitapafi.22web.org/jarokisukise.pdfIn PDF document text
    • http://begefif.iblogger.org/walt_disney_animation_studios_the_archive_series_story.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/JlhbTDb/zebonixevujagomunage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375204/normal_5ffd19464b973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_601228569fa33.pdfIn PDF document text
    • https://cdn.sqhk.co/kazakilen/ghdY1mu/quran_audiobook_english_free_download.pdfIn PDF document text
    • http://kukusorukabapoj.iblogger.org/dell_vostro_1500_battery_plugged_in_not_charging.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481061/normal_5fec18d3218d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_885160013d7046f4b31487caea0ca3d2.pdf?index=trueIn PDF document text
    • https://a529afa0-707c-494d-9cee-e9df2360aa12.filesusr.com/ugd/a6e48a_4e13aba5fe334025816d848e03089237.pdf?index=trueIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_bd66b6e04d4d4d0dbe90c5759ef98f57.pdf?index=trueIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_535b9100cf5f4e5f84e63e9cbc9662de.pdf?index=trueIn PDF document text
    • http://kupikobu.epizy.com/25001572877.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/3_column_chart_word_template.pdfIn PDF document text
    • http://megalikivokilir.rf.gd/nufikusizuwuretekez.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_b3007818de4d4b8c8aef13b7fe2fbedc.pdf?index=trueIn PDF document text
    • http://nisegup.epizy.com/65871804192.pdfIn PDF document text
    • http://zemonipovop.epizy.com/dell_t3500_ram_ecc.pdfIn PDF document text
    • http://diwomikutaz.epizy.com/gawodetoxidifan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 5164 bytes
SHA-256: 315e274d064de2da4154a8a44de00128a8643415b99facfb13520f815349c04b
font_01_sfnt_off00010860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10860 10792 bytes
SHA-256: 3698e9e7a05525d5ad718661bbc25c71f6209c5b8ba13d4b09a53634c1975f27
font_02_sfnt_off00012d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e