Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb6bec485c5e3b9…

MALICIOUS

PDF

86.5 KB Created: 2021-03-09 06:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2bb17c42d45ccff5b7f506cf2421571f SHA-1: a6acecb1f263aad1ad592f92de1adc54e11365d6 SHA-256: dbb6bec485c5e3b98373ea4395c0782a5da666644964a123f14c92b2143e3dc5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for SEO poisoning or phishing. The primary malicious URL identified is 'https://resalured.ru/award?keyword=dokumen+amdal+pertambangan+pdf', which likely serves as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=dokumen+amdal+pertambangan+pdf PDF link annotation
    • http://jaralet.getenjoyment.net/free_math_word_search_puzzles_printable.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/vizio_sb3820-c6_38-inch_2.0_channel_soundbar_review.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/stihl_fs_55_parts_catalog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_0dd0355ceb2b46bb9fad060ca2af5feb.pdf?index=trueIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_95fee7df61b14e65b30b65089fd51900.pdf?index=trueIn PDF document text
    • http://kupikobu.epizy.com/uc_browser_for_windows_xp_sp2.pdfIn PDF document text
    • http://jolavewavesuj.epizy.com/configuration_guide_sap_solution_manager_7._2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbfac24-a851-4671-91da-58f70fb5a43d/donafuzetodi.pdfIn PDF document text
    • http://zozujuzozupu.rf.gd/whirlpool_gold_series_dishwasher_spare_parts.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_d6f04c04c5874082be60a601799b1623.pdf?index=trueIn PDF document text
    • http://fujuresaw.epizy.com/devufexetelomalipewik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f28223-3a39-4d9c-87d0-815a931b5a20/convotherm_oes_6.10_mini_combination_oven_steamer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8e4719-c41e-4228-be47-7009a311d74e/zoxasiwobuzosobowevod.pdfIn PDF document text
    • http://wubexemetaxoru.epizy.com/96733303692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592344aa-4b48-4279-8161-a4cc63da21f6/perseus_and_medusa_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5adb65-77d9-4f12-96a3-663e4afee7b9/zupavupobeweziwa.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_a4445e9f81f04ff488451c26d49e1561.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/53edb908-3e75-41c3-a560-e8c18268c982/buwemewawipawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd85cb8-caac-421b-a0f9-bde69625cbdf/forgotten_realms_novels_in_chronological_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43258c04-53d1-42b1-b1ed-9de33ed2e3c4/xidonakekite.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_e0171d69b3a44c35922ff2e9daf62dea.pdf?index=trueIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_06fea97734d6461588d22c0cc2f565f6.pdf?index=trueIn 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_off00010874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 5388 bytes
SHA-256: 08508f2e43b54738d4afecbcb13dd490250dc49e7d70e7f2398ebd9355bd86c3
font_01_sfnt_off00011ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB7 16312 bytes
SHA-256: 5b922c966d2661d6a8158a33ccf31e9da4559d7553005117aaf83406cc52e8ee

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