Malicious PDF — malware analysis report

Static analysis result for SHA-256 2255909f1f2b50d9…

MALICIOUS

PDF

48.6 KB Created: 2020-10-31 23:56:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 40b29443614ca22218614d8a7c2db6a3 SHA-1: 4615db3055e7059e0499c2a18eddbc3c821bb27e SHA-256: 2255909f1f2b50d9d36d7192313e252191fcef900b5a35947f7c8aa1009ccfb0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?keyword=anderson+v+dycon In PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/xarojebapedutu-duxulilusufepa-zozemigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f9250eb98dac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5f8eb5945181e.pdfIn PDF document text
    • https://miwilokak.weebly.com/uploads/1/3/4/3/134375457/4950010.pdfIn 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://cdn.shopify.com/s/files/1/0429/6107/6387/files/84269399814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5373/8915/files/mythologies_roland_barthes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2321/8341/files/input_type_file_accept_docx_and.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/cansancio_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/7877/0848/files/browser-based_games_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8138/2046/files/vinayagar_slokam_in_tamil_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8633/1038/files/segagim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8819/9332/files/mijopodazosizavitekuxumi.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/tokolosemenufikupigasakav.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/kisemalawodovujevujetakez.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/dibitepal.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/the_economist_21_july_2018_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BC 4504 bytes
SHA-256: b5d1b444771dd537fffc5ba85cae761e15d98b6c0afaf08da9fc3f7a4ce151a0
font_01_sfnt_off00008201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8201 10544 bytes
SHA-256: 372144258011fe68e52beba2173e010bf08f6324bb8b85f968b49aae8e9db2a1
font_02_sfnt_off0000a5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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