Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bc6ac18aa189a5…

MALICIOUS

PDF

77.9 KB Created: 2021-03-17 21:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 74c7da6e851508f55fe87e64c6e96519 SHA-1: 32902993ce242ff4f7e24b657b2628f1c148141c SHA-256: e8bc6ac18aa189a5da3886cfb0e2ab518af0c7cace4e4d346176e06b20d11055
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://jacksth.ru/wix?keyword=concept+of+language+diversity PDF link annotation
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/bobepolonubizojowon.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/jdbyhjA/home_depot_bricks.pdfIn PDF document text
    • http://alphabitx.com/electrical_wiring_residential_19th_enybu0.pdfIn PDF document text
    • http://vykupavto54.ru/bushnell_binoculars_repair_canadaxez57.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/dFhifzx/73333832197.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/zHgijg9/1047032059.pdfIn PDF document text
    • http://fdvsefwfrw.space/general_knowledge_quiz_and_answers_easy1qz4t.pdfIn PDF document text
    • http://apparentlyopt.com/93435236422i7rte.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/RjeqHgh/bonokuja.pdfIn PDF document text
    • https://mutefalififide.weebly.com/uploads/1/3/1/3/131383766/wobugum_wirofavaso_dexovi.pdfIn PDF document text
    • http://monoga.space/bootstrap_kanban_board_templatebgju0.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/mizenugogotele-dowimodukug.pdfIn PDF document text
    • http://iglivesupportteam.com/xomogas0a4l8.pdfIn PDF document text
    • https://cdn.sqhk.co/sebudesusoj/ghjbyjc/caption_for_group_picture_with_friends.pdfIn PDF document text
    • http://english-10.site/how_to_play_edge_of_the_empire_roll20ihfiw.pdfIn PDF document text
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/darif.pdfIn PDF document text
    • http://kesogapebenem.iblogger.org/niruf.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/c46f60a9-c866-4ebb-8950-23eee5b6cc58/37668145871.pdfIn PDF document text
    • http://perezibef.rf.gd/16160912077.pdfIn PDF document text
    • http://wozojarigirodo.rf.gd/political_aspects_of_aligarh_movement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c296c3d6-ca99-48fd-b28e-b5210e2bfade/88583914726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83c8bd8-0eab-495d-8b91-12ce15c2e6df/what_is_the_best_jiu_jitsu_gi.pdfIn PDF document text
    • http://viveguwoxifug.epizy.com/dijiv.pdfIn PDF document text
    • http://pekapajekuxipuj.rf.gd/89350817185.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_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 1872 bytes
SHA-256: cf373f8eb364677dc8d29ae0cbe658a1b8665e9067f0cd69b3a2e84d4b370a53
font_01_sfnt_off0000f1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 5392 bytes
SHA-256: a5633be37bb64a73ab6248743998b5b6a8b6cd7c36c2d594d8bb828ecba87e53
font_02_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 11004 bytes
SHA-256: d4c339ab38300914f68d8545e7d30d81ef927cc80854f6cda6ea38dfb01085d4