Malicious PDF — malware analysis report

Static analysis result for SHA-256 366f34b3361eb583…

MALICIOUS

PDF

65.1 KB Created: 2020-11-09 13:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 08132768ad99e9321d354bbfe20adb48 SHA-1: e896785dced8d61b8824113d81cad5d0ee58101b SHA-256: 366f34b3361eb583aab3b8db170e45dfd73c1936b3ea97a59f88d9757bdc5a44
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://traffking.ru/aws?keyword=k+means+clustering+in+r+studio In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f9869da9c764.pdfIn PDF document text
    • https://rojisubul.weebly.com/uploads/1/3/4/5/134593633/guzedakapigemaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382962/normal_5f915c0e2df58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f93e5f492ac5.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/7328348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f8d716a03aa0.pdfIn PDF document text
    • https://rikujenaxa.weebly.com/uploads/1/3/4/6/134667742/1872390.pdfIn PDF document text
    • https://musagitunoton.weebly.com/uploads/1/3/4/3/134368320/wariseta-xubeze-gavegazog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f9170d9d8bcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f8b818aa1958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f9ba30067fd2.pdfIn PDF document text
    • https://sojomirolasa.weebly.com/uploads/1/3/4/3/134325131/5e031d9bb.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/d5583.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/spiderman_presentation_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/jufusunuvujadenikulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a120fb-2ba0-4e97-b754-7b83456fb15d/tigolerivazalunumunafero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b4e9ee-6036-4649-9c4a-181b45b766bd/nodaway_valley_schools_ia.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_off0000a6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D3 5228 bytes
SHA-256: 93233fa48c0a0ff7305fe4e6a0b729c6fb149822f6d32995357707fe9bcdf884
font_01_sfnt_off0000b880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB880 12220 bytes
SHA-256: 498ce59ce060e4839f220cb11e34b573872ee5c34f2e7d483af77d006eb63b74
font_02_sfnt_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 16176 bytes
SHA-256: ec9986929bb8e82e8659f3ce4caa92260035ff1cb75e76a0e0d57d8883caacd9

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