Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ace7387238f762b…

MALICIOUS

PDF

73.3 KB Created: 2020-12-27 15:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b2de9c3775a7a429eb30a454a31e9c50 SHA-1: b1f24277e5160d161bbbe6195f60e77fea764ba5 SHA-256: 1ace7387238f762b819ee86ef072ab6492795c77dfc33560c1aa090fea3d2ff1
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on suspicious domains and appear to be part of a link farm designed to drive traffic. The primary URL points to a site that seems to offer software downloads, suggesting a lure for potentially unwanted software or malware. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=minecraft+story+mode+download+windows+10 PDF link annotation
    • https://cdn.sqhk.co/vizinifum/cDZxhiQ/73357625790.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/zewewixu.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/jhgihnJ/endless_run_magic_stone_mod_apk_revdl.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/dinisemowoge/vijegotosal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6893b3e2-324b-4800-9a65-14ff8cb89af8/50987678878.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/albania_visa_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1239ce0d-8a89-412c-b754-f16e392646b4/48028300139.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/list_of_politically_correct_terms.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/pukubepisezoriw.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/file_explorer_pro_apk_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db0819d-f836-41b2-b578-f9d47e444077/dedojowetedevuridofod.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/61623930073.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_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 5560 bytes
SHA-256: 5e14823d95925061b0603b6f6f79a3f22a4223850e8aaba0259d47a43426f568
font_01_sfnt_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 10236 bytes
SHA-256: 85ae849676754a43a9fdf29cee3cbc589467ad29f6d139ccf82040d815f45d74