Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7a54bc4b304f51…

MALICIOUS

PDF

45.6 KB Created: 2020-11-07 11:17:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 634fb3ae28525da9c29aa62bd6a74674 SHA-1: dceb974a98bde4135d2b0a682abf23b00e713982 SHA-256: 3d7a54bc4b304f51876c5fd01bc71ad880dfd5436d3762fafad53542523d3208
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=angel+summoner+and+bmx+bandit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462986/normal_5fa296014f8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_5fa5bfc8bebd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404959/normal_5fa558e52511e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f88c9155f549.pdfIn PDF document text
    • https://vobelerevofago.weebly.com/uploads/1/3/4/5/134596527/moraj-jimanoginufod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5f932481c0e8e.pdfIn PDF document text
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/2714179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_5fa052a543311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f8a80e807e87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371023/normal_5f9a92e77f67a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f9d0ef3a7b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409420/normal_5f9fce450ee04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f8935f6db7f4.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/22253cc0-85f9-4a75-93a8-e53143e01d02/sakikajevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f140ee1e-3b0b-40a3-a37b-e2accbb81bab/jerobodusivepubakedazizuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2876eb6-74b9-4163-8015-f375b6328a98/nuvomunemag.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_off000065ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 5224 bytes
SHA-256: c382c8fcfdd55dde2d6d07a28a4f61f4e3e37823df00674920979ff19a02b0fc
font_01_sfnt_off00007795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7795 10392 bytes
SHA-256: bc0f1d843380f306f8a4907e4495107da8aa85c8df2d87a89fc5eeb7a90a205a
font_02_sfnt_off00009b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B33 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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