Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0d4273f091ac7e…

MALICIOUS

PDF

89.8 KB Created: 2021-03-29 18:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 024ad9cd7999f08bc1fe45fca7a75fdf SHA-1: 8c54979ce3052ea6343dc9bce01c8d01ab72c501 SHA-256: 1f0d4273f091ac7e4ac6b80250953872a87b5b8b600227ffe90f62fd1b83982e
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, with one prominent URL pointing to a domain associated with phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further suggesting malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/award?keyword=bless+the+broken+road+piano+sheet+music+pdf+free PDF link annotation
    • http://kodavuviguwu.mypressonline.com/7739058379.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/junigogeda.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/octavia_butler_dawn_analysis.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/tikepaloxasuveraxunob.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/area_of_circle_triangle_square_rectangle_parallelogram_worksheet.pdfIn PDF document text
    • http://vobajujabu.mywebcommunity.org/tales_de_mileto_obras.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/how_much_is_a_ruud_gas_water_heater.pdfIn PDF document text
    • http://terugate.mypressonline.com/analogies_questions.pdfIn PDF document text
    • http://rusewigojubilon.mygamesonline.org/7758240657.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/how_to_read_a_metric_architectural_scale_ruler.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_be0c2661ed23429db99a743d180338e8.pdf?index=trueIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/drawing_human_anatomy_free.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/zifufaxajaletikazad.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/39129055371.pdfIn PDF document text
    • http://peledopa.myartsonline.com/surah_mulk_sheikh_mishary_mp3.pdfIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/red_notice_bill_browder_book.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_7cc14ec40cc64261acb9a8f09f3a89ab.pdf?index=trueIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_2bdcb80405574a34a0e2884bdf81aeb3.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_b3e8e9023a734260a69e3924486e062b.pdf?index=trueIn PDF document text
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_12062b34d08244a2b1b5a1dbc9994cf6.pdf?index=trueIn PDF document text
    • http://pawuzax.onlinewebshop.net/wodofevubuxez.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/65160244577.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/tinder_pro_apk_onhax.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/cladograma_exercicios_resolvidos.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010b37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10B37 8632 bytes
SHA-256: 090e70b133ce6c4ecb4fbc4813d3fa6fd6318adcbafbd487901dd2ec0d2d9559
font_00_sfnt_off0000f8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B2 5528 bytes
SHA-256: 77c3eb60bf883d7e5203f0e3cb352850fba761f7ff5abb1c9b1cdd3d97dbc725
font_02_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 11704 bytes
SHA-256: 3a8a84a4bede7911388bee2742262374840d847ed389838004a6bcff05b57a1a
font_03_sfnt_off00014b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B84 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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