Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9eac1d5b6dc26eb…

MALICIOUS

PDF

49.2 KB Created: 2020-11-04 00:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 8e9afc263e2549e0bfe20ec17ac3bf7b SHA-1: 47587b84557560e1fb4511199a6b637b35e9f9b7 SHA-256: c9eac1d5b6dc26ebdc2df837282cca4b2217cf35be09ec2176c8fbc384ba2e44
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://ttraff.me/123?keyword=avast+cleanup+premium+activation+code In PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/8964191.pdfIn PDF document text
    • https://bululirujoko.weebly.com/uploads/1/3/4/4/134487270/fapagugud.pdfIn PDF document text
    • https://fegilekupajot.weebly.com/uploads/1/3/4/4/134404616/nalilegusabu.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/c7346ed22d7.pdfIn PDF document text
    • https://moxetutatag.weebly.com/uploads/1/3/4/2/134234950/vujofotodemoniruvox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5f980f8e9514b.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/piloviderololoni.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/4791618.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/dixaleko/73367496888.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/salela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f8fdd6-c66d-4c05-ab99-e82fc2872e7f/db2_sql_error_sqlcode-407_sqlstate23502_sqlerrmc.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/how_to_rebuild_a_harley_brake_caliper.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/my_pltw_1.1.5_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d9751a-0fbd-4042-881c-eb5fc0d4e141/junumoxoro.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nogigaxewusesad.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/94924148643.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_off00006f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 5152 bytes
SHA-256: c4dc38d69355a3856c3178ef1f999a88ec49c960ef22a7f2595f17fcc316e6b2
font_01_sfnt_off000080d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D3 13684 bytes
SHA-256: aa0bb65e2edbfa3457576709b0a34ec5bd4f35cca6eff196e46dce08f5cdde3e
font_02_sfnt_off0000a9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9BC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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