Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ba2a316a6a8890…

MALICIOUS

PDF

49.3 KB Created: 2020-10-17 09:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 51a4b08144ee84e4e70ce77772edec21 SHA-1: e14ccd71c45aa1fbac5190b863eef1680686dd02 SHA-256: d8ba2a316a6a8890faeeef6d60a8f0ec1217c79cda0a20e2f3a194c2abf4b331
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://ggtraff.ru/strik?keyword=torti+point+himalayan In PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/d0a0f68f06.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/jetugapop.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/b08024c4c5858cd.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/4443116.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/f97d55542b.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/ribazewuloxonedutu.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/garokegabevowi_fovumetoranej_lijeketagolu_zikoseg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ab68f3-cba8-4df7-a5ca-828b4e7c7099/devolazevaterapujizemil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a04e67e-4816-4328-96cc-4265036c7665/voradotizawapivimugilin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e30a96f-1453-47a2-8c9c-a8e1568eba49/80443760291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bdf434d-325d-466c-a360-49ed3b830d79/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8385e869-c2b9-48e9-a6a5-d1b9135bbcfc/bikomerugewuzusajuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3402d109-73c1-42b2-b249-ab86a57b9bb7/55190098018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/389f8d43-391c-4123-b8ff-95996a9f0554/xujowamivewufatezow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/machine_shop_training_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5673/4630/files/53667857872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/megenojag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3597/9676/files/circular_motion_study_guide_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 4932 bytes
SHA-256: b19648eb00a36244f32a80a7491e9e7fb2fc3298efcf195520b0340ba3ac9084
font_01_sfnt_off0000766a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766A 10676 bytes
SHA-256: 6dc7c59992f5053f816e582e5673f3e949d88010dab1095ad3e265202c3bc0fb
font_02_sfnt_off00009b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2C 18448 bytes
SHA-256: cb273cf73a1011322ff67b1d54ed55d25c232354c5bb04cbb167c7ef395dd61f

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