Malicious PDF — malware analysis report

Static analysis result for SHA-256 1486a62bb160e33e…

MALICIOUS

PDF

78.4 KB Created: 2021-03-28 17:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1d8b7ad94665765e717d616b3e271d02 SHA-1: c6aea04859f375fe99ae038e8c68cba7227afc32 SHA-256: 1486a62bb160e33ea261fc8e13a8d4689e5b7e67cb6211c38cbf896d8156cf36
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/award?keyword=diagramme+de+phase+de+l+eau+pdf PDF link annotation
    • http://samyog.ru/compiler_construction_principles_andg8sa0.pdfIn PDF document text
    • http://vonowaz.iblogger.org/aaaah_tamil_full_movie_hd_free.pdfIn PDF document text
    • http://espaceabonnes.com/sonic_oc_sprite_sheetqkto5.pdfIn PDF document text
    • http://nelilovodik.scienceontheweb.net/how_much_can_a_dodge_ram_ecodiesel_tow.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/geWhfib/vazifodepereb.pdfIn PDF document text
    • http://likujodofefa.22web.org/is_the_canadian_justice_system_fair.pdfIn PDF document text
    • http://gizesodawesiv.mywebcommunity.org/asme_y14_5_gd_t_standards.pdfIn PDF document text
    • https://cdn.sqhk.co/bitenutugiw/CjhwXIg/wateduvorafesasa.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/SjhjiqM/fazumerixekabazubalexupi.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/pofefitugenotatid.pdfIn PDF document text
    • https://dupukixulin.weebly.com/uploads/1/3/2/6/132681516/fuwukob.pdfIn PDF document text
    • https://cdn.sqhk.co/rabuvimi/iahfgfh/best_football_league_in_the_world_fifa_ranking.pdfIn PDF document text
    • http://randname.ru/krups_nespresso_machine_not_working_properlyeobpw.pdfIn PDF document text
    • http://mijudivoxobo.iblogger.org/content_writing_jobs_online_india.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/73740690677.pdfIn PDF document text
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/sotuwedenuzafez-vumonuzomotib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lutidufewujasa.epizy.com/11130699202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3d83d3-af98-448e-bb2e-296bd8976704/the_invisible_man_hg_wells_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32d7b8c-4506-4779-b53e-904a1d37568c/32093286312.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_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 5456 bytes
SHA-256: 18e44ad482c39758fee36ffab7c3a5192baa74ab5fe6167db24123a1b70538a1
font_01_sfnt_off000101f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 12772 bytes
SHA-256: 0b836d4905c0c288ae6c5e981aa5e9ca7c256e52f6bb75818f9b59b041936cd1

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