Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c69d869b5680a26…

MALICIOUS

PDF

79.2 KB Created: 2021-04-14 07:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 13de80d4d430644aedd33517554a6401 SHA-1: 8eb4f13f03733a3c172bbeb134892d8cc391bb86 SHA-256: 3c69d869b5680a26909bbf6a455c36cf29e24045409918bc1792da0282e56036
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with a high concentration on disposable hosting, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to reference 'Warriors don't cry chapter 7', likely a lure to entice users to click on embedded links that lead to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/strik?utm_term=warriors+don%2527t+cry+chapter+7 PDF link annotation
    • https://cdn.sqhk.co/sivefuxonix/Yijgeic/botagazapozizake.pdfIn PDF document text
    • http://fogapab.22web.org/zuzezadewiwavuwejumoxagon.pdfIn PDF document text
    • https://rulonejuwa.weebly.com/uploads/1/3/4/7/134749835/nevagakepezetol.pdfIn PDF document text
    • http://ejinaya.com/posegenaketawutufidekovjllo.pdfIn PDF document text
    • http://chempion.coffee/what_is_project_zorgo_leader_namebg9mf.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/random_digit_dialing_ap_govwzeao.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/jabmhQC/xeragekonavusit.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/45bc48307ef39.pdfIn PDF document text
    • http://kuxni.su/moxedipunekixojudizata31t8t.pdfIn PDF document text
    • https://cdn.sqhk.co/pajegili/1hdjfhd/52897410718.pdfIn PDF document text
    • http://cookwellbakewell.com/hill_climb_racing_game_bus_simulatorzf6f4.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://s3.amazonaws.com/fowikorejodi/hp_motherboard_list.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_c48feecf53504aed9968c504ada68d92.pdf?index=trueIn PDF document text
    • http://jazipas.epizy.com/40023914469.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/4804771820.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_a9c0a17e7d444e18b0a8b4f7aa134dee.pdf?index=trueIn PDF document text
    • http://jezirateba.rf.gd/riesgo_psicosociales.pdfIn PDF document text
    • http://vamuxusonepuf.rf.gd/19593326256.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_53bfd76db06147a99d6320002e20bb53.pdf?index=trueIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_5c6510b658894705bb7953c014dfb5b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/how_much_is_the_train_from_nj_to_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/neditonu.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/97094339915.pdfIn PDF document text
    • http://labinugekifuv.rf.gd/fovunejijat.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_off0000e738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 5148 bytes
SHA-256: 77590c89b1c109638480be4bf5f5c7b683c3570b548d4b814c163fdf43f337cd
font_01_sfnt_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 12176 bytes
SHA-256: 96c0c038240a1932df862b22ee3594f4d3636c9c7dd53483e27e69b10eb3eccf
font_02_sfnt_off000121b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34