Malicious PDF — malware analysis report

Static analysis result for SHA-256 9443df28411a216e…

MALICIOUS

PDF

59.1 KB Created: 2020-11-09 06:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8589b1b5b6bc29c6324e3d8260ba55c1 SHA-1: d95d236f32ed6a923ac45208d2d611dc71ec6004 SHA-256: 9443df28411a216e0754b3e600b090e4afdb7a08763fed41f00731b491905003
66 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 1.0000

Heuristics 4

  • 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
  • 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://traffset.ru/123?keyword=running+man+203 PDF link annotation
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/xazumaziz_wafozuzofati.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/6626404.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bagawux.files.wordpress.com/2020/11/hotarubi_no_mori_e_download_mp4.pdfIn PDF document text
    • https://gorujugiximu.files.wordpress.com/2020/11/karipevo.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafe6373-c9e3-47bd-b84c-59cd1151e540/79265279759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591d2ee3-068f-41ea-a336-0b574b2ef259/wizitegi.pdfIn PDF document text
    • https://vusesalo.files.wordpress.com/2020/11/ap_spanish_reading_comprehension_practice.pdfIn PDF document text
    • https://bojugese.files.wordpress.com/2020/11/momumomutezafubavatit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644acb6a-beb3-4ee8-8aea-ab9c9f59448c/tabela_de_oleo_de_bengala_honda_cb_300.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000841d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x841D 5144 bytes
SHA-256: 00b5d9411f038418bd88f4b78b9bb07a5edb4eee847f29361696ad4b8fac92d5
font_01_sfnt_off0000959c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x959C 10328 bytes
SHA-256: ff1a208890cdb253c6a715ce35644f5fbc3ab2e73d9dd92fe9106586234fac07
font_02_sfnt_off0000b8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F6 22352 bytes
SHA-256: 48351d23629370ccea71eca6face68281733e1018d4438c99c235a3521cbf5a9

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