Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5007fb86069dba1…

MALICIOUS

PDF

86.6 KB Created: 2021-04-12 08:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 281818d05cc61ed86278d9d5755109e9 SHA-1: 9a81240d6261476f2ee5e97397ab530d0f4208d2 SHA-256: e5007fb86069dba18b3d8f2067d21694f93f37b75cb937ba54bdf4acbb824f8a
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://dugedepap.ru/strik?utm_term=char-broil+grill2go+x200+canada PDF link annotation
    • http://womizepivilora.sportsontheweb.net/irrigation_engineering_and_hydraulic_structures_sk_garg_download.pdfIn PDF document text
    • http://xumetosakonir.iblogger.org/aptitude_test_questions_and_answers_of_tcs.pdfIn PDF document text
    • http://femokotafi.66ghz.com/kogifi.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/anti_magic_academy_novel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485313/normal_606785b58c93e.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/82038639392.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/mumirijigexo.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/larin_2_1_2_ton_floor_jack_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_6059e2fe9960c.pdfIn 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/c7534e25-1099-4844-a8c0-d6a56fe776d5/halo_the_fall_of_reach_book.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_3a881e489b06476a97c976f3f1df3108.pdf?index=trueIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_a141c7e128e543c083a4c3d1c21a1c03.pdf?index=trueIn PDF document text
    • http://bememikat.onlinewebshop.net/zosoxoxigiwosob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0172ccc-0f7d-4f01-9981-7441d31fbe35/how_to_use_mirrorless_camera_as_webcam.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/kaworadonovedevexunugale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d508988-b93b-4187-aee6-760c1b735c8d/35636150982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b359e1-f8d3-444e-8b40-da9be7949e7a/panasonic_viera_plasma_tv_apps.pdfIn PDF document text
    • http://tulinavosubod.rf.gd/lokususewuwavoxekivapaf.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_c97cd8d7c26244be864d08cfe08f93cc.pdf?index=trueIn PDF document text
    • http://rabatelekovufar.myartsonline.com/hampton_bay_ceiling_fan.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_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 5440 bytes
SHA-256: cd7dd248778ceb62637ad510153f1895d4220e1f13a73deb00a798e9f6eacdc5
font_01_sfnt_off000121a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A8 12852 bytes
SHA-256: 14466cf820af1f58ac1dea7f8f7aa72528a338af776033aac35f810c9050dff4

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