Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10ed98e511c98bd…

MALICIOUS

PDF

75.1 KB Created: 2021-02-20 01:38:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a4fb79a844338ee925c1f341360e02f3 SHA-1: c6bff2e4942a5a5dd5e732b6922e173bed49037b SHA-256: d10ed98e511c98bd5a860b0be18053c68b91186c40aed34920d7d5403f5bf788
94 Risk Score

Malware Insights

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

The PDF contains a link disguised as a software registration code offer, which is a common social engineering tactic. This link redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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://crophysi.ru/wix?keyword=mixcraft+8+free+registration+code+and+id In PDF document text
    • http://yildirimotobursa.com/neludewuviruzizariyp8.pdfIn PDF document text
    • http://wide-mean.top/zugutapa9jhbc.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jIjahha/tirokenovojorivomozoxafi.pdfIn PDF document text
    • http://instasale.company/pokemon_theta_emerald_emulator_downloadtgdut.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/kwgijtg/minudukaguroken.pdfIn PDF document text
    • https://cdn.sqhk.co/raxavetaletu/d8hiNNO/zifupu.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/jejfgcL/jbl_link_music_black_smart_speaker.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/jbhhh8g/mometirafisojeg.pdfIn PDF document text
    • http://4gusevshop.website/inter_tottenham_tv_guidex5c6v.pdfIn PDF document text
    • http://dronextactical.xyz/c_programming_tutorial_video_free_download_in_hindibvewy.pdfIn PDF document text
    • http://all-gopro.com/64649959984aaph7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dabatisew/76530548543.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/belichick_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/pdf_to_word_converter_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/reporter_vacancy_list.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/addressing_modes_types.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/kendo_scheduler_date_header_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/canon_t7i_manual_portugues.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_off0000e935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 5424 bytes
SHA-256: 9cd4db5019416e028b9d804e82ebfcf64955e4b30f36d0b287602e588d050ac1
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 10240 bytes
SHA-256: 1f39d04f2517fd6f2a72ad52ed3f2aece0dec26e97278e82879753ec7ef2832d

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