Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbcb22923114518…

MALICIOUS

PDF

40.3 KB Created: 2020-11-08 23:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3ac416880ffd1b90c71551ce4d6755c2 SHA-1: 25944e0074077eaffdd32218dbdea74510a1b53c SHA-256: dbbcb22923114518031a34e479826013d4736d830b042c85a3c3e2fd38c32589
96 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 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.
  • 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://trafftec.ru/123?keyword=what+is+an+excel+file+called PDF link annotation
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/xasaj_ridafat_lametefizi_dotanuwezezomuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_5f9373c9b34ec.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/xoribavinij-xinamo.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/5510277.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/gakever.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://uploads.strikinglycdn.com/files/56d10919-81df-43a4-b252-69a772a30c6b/dumbbell_exercises_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1a1c99-e6d5-4ca5-add9-26556334ebf9/19325817876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16152e45-3842-4836-a67d-9b3f74c141a5/causas_externas_e_internas_que_propiciaron_la_independencia_de_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547c6063-c049-473b-8cd5-49d101faa696/26_week_money_challenge_10000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b1ea0b-3624-4f5a-a04f-3ce074d9ac88/gudijoludojefezev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938f99ef-0b33-4225-824c-ac4bfe4b8af5/lijekorik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/292dcf2b-06ac-4b8a-a634-15d61850658a/puvoxaxibobarelasatuvoje.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_off000050e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50E6 4772 bytes
SHA-256: 74e2d3afc9fe6e3bba8e5823027f961b1f8904b143b8827be8aa2374e91cb5c8
font_01_sfnt_off0000611f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 10776 bytes
SHA-256: 59fe6f2fedbf355964c1e7362232aafd90379391742183ab08534e624e20585f
font_02_sfnt_off000085dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85DD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.