Malicious PDF — malware analysis report

Static analysis result for SHA-256 c757008ea6d88ab7…

MALICIOUS

PDF

40.8 KB Created: 2020-11-08 23:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1bc3db4dc293cde1dedda66eeeaea4e8 SHA-1: 90911c3eb4fd2a015364b0739b0a3161589707a0 SHA-256: c757008ea6d88ab71fa9f1851c25143b398cc3c0618fabfe699987c880d1a42e
66 Risk Score

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://traffnew.ru/123?keyword=free+nitro+type+hack+generator PDF link annotation
    • https://maduvifodowemo.weebly.com/uploads/1/3/4/6/134692972/2048876.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/a95e175bcf.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/cc7cb1b7038864.pdfIn PDF document text
    • https://petugureb.weebly.com/uploads/1/3/4/4/134445868/wedobejinijogogiwow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rimixukamo.files.wordpress.com/2020/11/87012992094.pdfIn PDF document text
    • https://xenogiw.files.wordpress.com/2020/11/duel_of_the_fates_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f8028b8-5588-4840-a5ee-e836e7d67b5f/3749537800.pdfIn PDF document text
    • https://jokikujiwer.files.wordpress.com/2020/11/meliw.pdfIn PDF document text
    • https://naligujabe.files.wordpress.com/2020/11/panixonawojidugasirikiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28efb3bd-4117-4afe-8fbd-688e5b59c9ca/band_of_brothers_episode_9_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e002b3-37b1-4a55-89cc-af99efba8c7b/kapevoz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C5 5108 bytes
SHA-256: e3c51475a88906e196c761b7de690df2d73560efc9f8795877a891cb90b5ad92
font_01_sfnt_off00007331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 10324 bytes
SHA-256: b7082025ba0258ab9fa2be0bb7111ecd17fb8d241af754ab0472d4edfc698f50