Malicious PDF — malware analysis report

Static analysis result for SHA-256 130eb6d45200366f…

MALICIOUS

PDF

65.2 KB Created: 2020-11-13 08:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e42b6eb0c79c2e8293bb11380749a6e2 SHA-1: de4c76fccd9a8574b3723e76f55af77bc715155e SHA-256: 130eb6d45200366fbeb57da7ef98b2eebb4e495cf344bd5288d2cacfa06e52a7
96 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 0.9998

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://trafficel.ru/123?utm_term=romeo+and+juliet+important+quotes+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5fa2ca4a8c505.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/8732589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f8e3dde1b8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5f8d7ca5bc39f.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/mafokimudiwuta-ruxaxu-pakewodariguwis-kakozirapuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5fa92c1ba5c8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wisuw/sport_heads_basketball_unblocked_championship.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/cardiac_cycle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/af_museum_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/kiwukudabu.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/burton_guster_actor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7ee337-f49b-471c-ac31-53c63eef7347/roziboji.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_off0000c344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC344 5564 bytes
SHA-256: 31b864738d0c7c54f5a9013ec216040532498efd04366bd9ad983cb60c840488
font_01_sfnt_off0000d614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD614 9968 bytes
SHA-256: 10d7a3467bbdfd38d9844ec9941dea034c6b2b164faaaeea1a4f008deb5575e6