Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f8192e43f891d0…

MALICIOUS

PDF

34.3 KB Created: 2020-09-29 22:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e352f4cdc9cb3ce20401cb9f0af7de51 SHA-1: 8fc341ab2f0c526b58b95effea0e8a4ce6e3a989 SHA-256: 20f8192e43f891d0f1c84b4b2808d584bd52a1c9e10f8aaae5b29b41e6550a47
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=saurashtra+news+paper+bhavnagar+pdf In PDF document text
    • http://raxalabo.thelabdesigngroup.com/uploads/1/3/0/7/130775027/xezuwabefadofe.pdfIn PDF document text
    • http://dozozikib.moorehs1984.net/uploads/1/3/0/9/130969873/sojig_duvawokub_jufiwaki_nezikuxikuxovo.pdfIn PDF document text
    • http://files.bukekan.com/uploads/1/3/1/3/131381919/mimepesowimetef_pesufetagadag_zodejo_pafevolurovob.pdfIn PDF document text
    • http://files.emilysweeney.net/uploads/1/3/2/6/132696414/runogasowomepig.pdfIn PDF document text
    • http://xixawiwe.grimoirequest.com/uploads/1/3/2/7/132710621/refok.pdfIn PDF document text
    • http://dowaju.arcir.org/uploads/1/3/0/9/130969895/loxosav.pdfIn PDF document text
    • http://filatep.tnooyi.com/uploads/1/3/2/6/132683014/3675945.pdfIn PDF document text
    • http://files.katyprairiepromenaders.com/uploads/1/3/1/4/131453198/gesezid_doxitepuxitatu_jegekeduti_xoxefuwepuzoro.pdfIn PDF document text
    • http://files.howemtnknives.com/uploads/1/3/0/7/130739684/526055.pdfIn PDF document text
    • http://files.katsmodernizedhomedecor.com/uploads/1/3/1/8/131857782/zowivupelodo.pdfIn PDF document text
    • http://files.boostsportsconsulting.com/uploads/1/3/1/6/131636589/teboluneretir_tememaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5950/3519/files/zexevujexeliruzam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/7615823031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/brian_regan_nunchucks_and_flamethrowers_youtube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1096/4131/files/vedenojonixa.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_off000047ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47FF 5664 bytes
SHA-256: ca96a2ec0562cbbf10b65748c24f0fbc5b7443733406df54e9aef4607f38fd8a
font_01_sfnt_off00005b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 9672 bytes
SHA-256: cc6a6506a422a0612d6325c6fe497d9c301e68ad9c00b32d502a93e0e9ea98ee