Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb4eda96925e465…

MALICIOUS

PDF

68.9 KB Created: 2020-11-09 03:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3b4c22eb3d99fb36313f0fbe44076ea8 SHA-1: de43ab1d34783adda89954dc357f3e74fe5f3048 SHA-256: 4eb4eda96925e4653f536a1d049a9c44205d9ce3465f12246674f771d94e5737
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains multiple embedded URLs, with a primary focus on https://trafffe.ru/aws?keyword=memorial+junior+high+school+ohio. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://trafffe.ru/aws?keyword=memorial+junior+high+school+ohio PDF link annotation
    • https://kobigaxa.weebly.com/uploads/1/3/3/9/133997295/merit-relonigib-wuluwori-susimidilixeza.pdfIn PDF document text
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/mabibaro.pdfIn PDF document text
    • https://pesegomogela.weebly.com/uploads/1/3/4/7/134700410/2636061.pdfIn PDF document text
    • https://velulaganivuvoj.weebly.com/uploads/1/3/4/4/134438708/dotosuzezopu.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/xifabilejilab/26610325472.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/jonomuzajezakawewu.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/84101961674.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/5435853853.pdfIn PDF document text
    • https://ronesifipule.files.wordpress.com/2020/11/pasefojowabe.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/kekawesokoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23c5c81-b0b2-44dc-8c9d-fba85c1da6e5/pifapuxipometanaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/gleichungssysteme_additionsverfahren_aufgaben.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_off0000cfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB0 5292 bytes
SHA-256: 83b21d470899559f3ade5a819a53e55432660b803508b3f653d8248e0a5d8e7e
font_01_sfnt_off0000e193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 10924 bytes
SHA-256: 256b37b63494116e3f6188885e5169404b201113d66010876a6413ac8755cdc8