Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2468bfae8e1ff3…

MALICIOUS

PDF

43.0 KB Created: 2020-11-07 03:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c42f125e0478e34f04dde9fe68c98e8a SHA-1: 1d20bd797db189d96bc2d184a93675d53c49aa90 SHA-256: 8c2468bfae8e1ff3f395055ec0daa6387339617ddc340dfcdc8f3d50df0b07d0
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://trafffe.ru/123?keyword=passive+perception+dnd PDF link annotation
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/640d8.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/gunowazurasogale.pdfIn PDF document text
    • https://sibikobibe.weebly.com/uploads/1/3/4/0/134040949/5337147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f870d0459ae1.pdfIn PDF document text
    • https://nuwaruwavup.weebly.com/uploads/1/3/4/3/134362645/6755828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_5fa4660faa256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5f94a9bf17e37.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/a61639a9d.pdfIn PDF document text
    • https://lifesodoxeduze.weebly.com/uploads/1/3/4/3/134372712/b9a81a65cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_5f8fbada02385.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/leguvefu/laxivupojojalelawoniga.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/34857581940.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/23691757515.pdfIn PDF document text
    • https://s3.amazonaws.com/lesepapusojifax/girlfriends_guide_to_divorce_season_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/59108452111.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.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_off00006899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 5096 bytes
SHA-256: aa7721445fe7796ed06327d8a5bbbf490150b4296201bca38b8a0da5c2200ebc
font_01_sfnt_off00007a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 10936 bytes
SHA-256: 6a9c835bda8b649eee98d77e939ef83c2a77f98dfcd1558197c2a002473eb775