Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e5e5038e64fbab…

MALICIOUS

PDF

64.0 KB Created: 2021-05-28 06:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7b540b4cef690c963f5b0d6bbfde9e33 SHA-1: 7d9dedc3d580129dcfab1a23c3597b970c6cc9eb SHA-256: 55e5e5038e64fbab4ef15c2c1091de01d30c842a73b44da0f093f3d93f27288c
64 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/123?utm_term=energias+renovables+en+alemania+pdf PDF link annotation
    • https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/bb7f1d0ab20edb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_60062c1716d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424985/normal_5fd1386a7612f.pdfIn PDF document text
    • https://magirodimape.weebly.com/uploads/1/3/1/6/131637482/5404431.pdfIn PDF document text
    • https://xukoperupe.weebly.com/uploads/1/3/4/7/134743664/2042851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481286/normal_602feb98b7eef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366668/normal_5fe2c3abdbb81.pdfIn PDF document text
    • https://lufavipipoj.weebly.com/uploads/1/3/4/5/134580953/6720403.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/jezipevux_jisobigarifomob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491148/normal_5febf4699c68c.pdfIn PDF document text
    • https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/3472e85de.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/fd55bd7e573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_6047bfbeea657.pdfIn PDF document text
    • https://rurasudi.weebly.com/uploads/1/3/4/4/134485231/jefesewanomu-patiwunem-jexevaxerogiw-xakamolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_5fd896295a5d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390324/normal_600953a47ece6.pdfIn PDF document text
    • https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/viritabogun_tudij.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/1a7dcf06-dc94-4f9a-995d-def66f6663b1/kiderun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2711b2-808f-4f11-b426-dbab3d55686b/brinkmann_5_burner_gas_grill_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18fbea7-7ab3-4d3d-ba3e-90b52feb06c7/world_history_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/227d6802-252c-4c3c-88ee-6eebfacc9f80/49257902995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe43b5b-4b82-4f69-9a82-657d3efc7aef/what_is_self_destructive_behavior.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 5228 bytes
SHA-256: 18193a5df246152efe418e73c9164ea9f9bf3dd6d4000ebbb947e14fc4d73ab7

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