Malicious PDF — malware analysis report

Static analysis result for SHA-256 432def6898b8e229…

MALICIOUS

PDF

78.0 KB Created: 2021-03-12 21:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1aaeee694af45fabf22f121f4f25f202 SHA-1: 9536404b040decf5a56582c602dc056066567571 SHA-256: 432def6898b8e229b9bacf80bec764212edff80f5a085757e3d42790f5f71f4d
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. 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 0.9964

Heuristics 4

  • 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.
  • 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://baarspo.ru/award?keyword=diary+of+a+madman+nikolai+gogol+pdf PDF link annotation
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/6555285.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/nisexadogiripopopajer.pdfIn PDF document text
    • http://nupifijaw.getenjoyment.net/bell_hooks_teaching_to_transgress_introduction_summary.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/7222596.pdfIn PDF document text
    • https://gezagijuxeson.weebly.com/uploads/1/3/1/8/131872295/32c3b83434.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/how_to_install_adobe_acrobat_pro_dc_on_a_second_computer.pdfIn PDF document text
    • https://nutakiderovex.weebly.com/uploads/1/3/4/6/134622867/4801824.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/21297302385.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suxorodefis.epizy.com/mathxl_test_answers.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/28280134028.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/reading_practice_worksheets_for_adults.pdfIn PDF document text
    • http://zatozegajuzu.epizy.com/code_de_la_route_utilisation_des_feux_de_dtresse.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/chaos_book.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/42962783748.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/timiwofavi.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/mukaxer.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/cdma_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/the_darkest_minds_book_series_review.pdfIn PDF document text
    • http://nekedejiwaki.epizy.com/is_blackie_from_narcos_real.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/parasitologia_humana_pereira_neves.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/thermo_scientific_lindberg_blue_m_water_bath.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/manual_central_telefonica_siemens_hipath_3800.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/bypass_google_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/lazetowogisavexatiferabeg.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/39368542641.pdfIn PDF document text
    • http://pobevezegudam.epizy.com/53083940035.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_off0000f566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF566 5348 bytes
SHA-256: 9c703ca0e260b312956e6f12e30f262770bf94c8f8bb6baeb538949ed459ae63
font_01_sfnt_off0001079c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 10200 bytes
SHA-256: a854a701f136831f32e0b3c4507305f22633db07ca36a49d82ae2907273c4c52

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