Malicious PDF — malware analysis report

Static analysis result for SHA-256 843af38fd4b8d6f4…

MALICIOUS

PDF

48.0 KB Created: 2020-10-26 12:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: ea020330f611c4721b456c8fc3eba2db SHA-1: bcf83cf9a595a5c765d51824c9644d8fa9a4f75d SHA-256: 843af38fd4b8d6f4b6c7f3f95a12469454a76e5d3e2ed24a8c931bbde34bd823
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/aws?keyword=bridges+math+intervention+pdf In PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/detujoxifa.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/zizelox.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/muviz_zomogofoxaxuf.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/2657291.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/5511052.pdfIn PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/48db4b5dffaa5d.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/5996138.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/d26353a63e9b0de.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/wopemuvekip-sowijej-gadofog-nutisowefiredes.pdfIn PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/1718853.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/lomuwanokik.pdfIn PDF document text
    • https://zonebudufekepok.weebly.com/uploads/1/3/4/3/134382159/latefi.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/rezatitanik.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/3607731.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/lilulumupokepi_bezamobajuf_xozida_sinazixigeta.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/2382265.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://s3.amazonaws.com/memul/1023505768.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/90991070032.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_off00006f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5D 5320 bytes
SHA-256: fe137d866f1687959103f3a23af06e582263dfbc818e077d0417d8114cacfbc0
font_01_sfnt_off00008153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8153 10412 bytes
SHA-256: b7c4eb86d32d8baf356b38529b3aa430d0e654674bc46a476ccc3f13ece8da52
font_02_sfnt_off0000a4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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