Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee60186620cca02…

MALICIOUS

PDF

38.0 KB Created: 2020-11-08 16:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2f9f4c24c5e85a93d9ced9d9a73773e1 SHA-1: db25e6f5756e90bc7ce289c1e7e13ca59a56d3cb SHA-256: eee60186620cca024bab700448dc4a568603cfc77faa818c37506e1418001a91
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 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://traffnew.ru/123?keyword=umich+anatomy+quizzes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5f9fdf7d035a6.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/vovofofaverun_sawivurovoj_nifawubazox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392872/normal_5f8f16dd59f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f9a13484c86f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385202/normal_5f8e6dcba3aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_5f9ed8d187e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_5f9f1312b6389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f9339737f448.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/gozega/achtung_panzer_guderian.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/aliante_vegas_nevada.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/rabbit_sniper_360.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/yakima_raptor_bike_rack_parts.pdfIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/20884693481.pdfIn PDF document text
    • https://napawun.files.wordpress.com/2020/11/88082609579.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_off000053a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A4 5180 bytes
SHA-256: a7bc449c5caec1357f74e59b000d8f946aec3537fac14070b6cea9c42db2f26b
font_01_sfnt_off00006536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 11280 bytes
SHA-256: 31cae0ae6b63e9aa4cc479a2c102122170c69c5667819e0873157a820c3763c0