Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45d18c91d54f35b…

MALICIOUS

PDF

70.7 KB Created: 2020-10-06 19:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 48fea46c8efb6e0b1ad1eb73addf7dd9 SHA-1: a5ad39d1fa5657a94d3084d0e8d8141230067dfd SHA-256: d45d18c91d54f35b6838f2564eee266c87c7d110817bc57b44499b2aa82dd101
184 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.
  • 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.
  • 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://gettraff.ru/strik?keyword=r%25C3%25A9sum%25C3%25A9+du+petit+chaperon+rouge In PDF document text
    • http://files.redkora.com/uploads/1/3/1/4/131437295/48f88a7cc6.pdfIn PDF document text
    • http://files.universityplacewallc.com/uploads/1/3/0/8/130874125/tisadavux-nujijadex.pdfIn PDF document text
    • http://files.carolinehartzell.com/uploads/1/3/2/6/132681438/67b276.pdfIn PDF document text
    • http://files.accesoacademy.org/uploads/1/3/0/9/130969371/xisesavawikisipuj.pdfIn PDF document text
    • http://ziferib.kellyannecostello.com/uploads/1/3/1/0/131070867/5514617.pdfIn PDF document text
    • http://files.klgdeehide.com/uploads/1/3/1/3/131398113/5766293.pdfIn PDF document text
    • http://files.synergyfxtotalfitness.com/uploads/1/3/1/4/131408062/naletifoxiwaf_pilaxepu_xalopowirab_xitojipe.pdfIn PDF document text
    • http://files.dholes.org/uploads/1/3/0/9/130969148/mulakotovenaxufej.pdfIn PDF document text
    • https://site-1036867.mozfiles.com/files/1036867/porurototenululuxi.pdfIn PDF document text
    • https://site-1039198.mozfiles.com/files/1039198/xisaxe.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/mifapujonuregorajezan.pdfIn PDF document text
    • https://site-1038699.mozfiles.com/files/1038699/28737648405.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/51213880850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1324/6623/files/india_vs_england_final_live_streaming_match.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4418/4474/files/kekkai_sensen_ed_song.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FE 3284 bytes
SHA-256: 81323831aa7e00f4360884382460f9104c99c12266bbad2f97f2ea78af2d5029
font_01_sfnt_off00009eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB2 5604 bytes
SHA-256: fa8be5968ebf20a6ad3de97a368087102a70d4c4e5b8f82753b916657ccd1868
font_02_sfnt_off0000b155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB155 12732 bytes
SHA-256: 1403736c5028e5d39268b13b4f14c25c8bf1ee7d35ace62bb894cb6c0e8fa39b
font_03_sfnt_off0000d894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 20892 bytes
SHA-256: 2ca404b22978797630f2f9eea202be1f74c96805515d34de382286b7c46de208
font_04_sfnt_off0000fd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 3376 bytes
SHA-256: 7a5e788da7b2d8073971e7a9d5659e2da272dd84fe6f75a2021e9988038a42d1