Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26d9b9d2a3ddcee…

MALICIOUS

PDF

82.1 KB Created: 2021-03-08 20:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4503304cb71f30613f3b06e89024b652 SHA-1: a2c9f1810c51bd12707105b19bf03724a5a85853 SHA-256: d26d9b9d2a3ddcee11a3bbbb5e66c57b9d1a562ae8e23be8b267917d66fea8b8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the link suggest it is designed to redirect users to a malicious site, likely for phishing or to download further malware. The document body, though heavily obfuscated, contains text related to 'Plants vs zombies 2', indicating a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/wix?keyword=plants+vs+zombies+2+unblocked+6969 In PDF document text
    • https://cdn.sqhk.co/dedomafub/DzijhhD/dijox.pdfIn PDF document text
    • http://pululap.22web.org/9611914267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fe1fdb5eb3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5fdc6cbc63331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fce2e0d71a17.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/PDhjijE/50th_birthday_decoration_ideas_for_her.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_602bf89128e48.pdfIn PDF document text
    • http://berozava.iblogger.org/livro_administrao_da_produo_terceira_edio.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/50193302267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5fc95b9ea2cfc.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/ptkgibk/wyze_outdoor_camera_sd_card_setup.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/69130357800.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/football_manager_2020_mobile_hints_and_tips.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/a_little_book_on_the_christian_life_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/hbIhguX/jufibamaginozedu.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/fif20sI/97269968033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fcd9f309b425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5ff9c14ac8131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fafivanewus.rf.gd/storkcraft_vittoria_3-in-1_convertible_crib_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0cea5fc-6908-4c92-bece-7836715060f9/how_to_change_level_on_jumperoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c692ea-b55a-49e2-95f3-cebed6c9b710/physics_for_scientists_and_engineers_serway_jewett_10th_edition.pdfIn PDF document text
    • http://kedekivotizera.epizy.com/apache_hadoop_for_ubuntu_14._04.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83da4ec-e1a1-4484-83ee-fd3f7d3c405a/fefivitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c05914-03bf-4eaa-8afa-5c4bb702b402/how_to_get_mobile_hotspot_on_at_t_unlimited_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1717b01-750a-4e7c-95ea-738033e196a2/arbys_nutrition_information.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_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 5744 bytes
SHA-256: 122dcac2129ac5387e41480d7bd53384fea57f93166b41baf775eac595f598c6
font_01_sfnt_off000117fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 10160 bytes
SHA-256: af1711e13b1b02c4ae032c74a957b012ff55129eb63fe1384c11802b23747f83

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