Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84d49ac7916bd2d…

MALICIOUS

PDF

45.1 KB Created: 2020-11-06 03:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e7060d2f62625ac04fafb61163ae665e SHA-1: 77cf7f13eb0c2adf916d6667dbf41ef1da4ad5dd SHA-256: c84d49ac7916bd2dcbd601bf05eda0eb57792462ce32122f18e3758d24d51cc1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various external websites. One of the primary links is to 'https://trafffe.ru/123?keyword=kik+lag+code', which is flagged as suspicious. The document's structure and the sheer volume of links suggest an attempt to manipulate search engine results or direct users to potentially malicious content, aligning with phishing or SEO spam tactics.

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=kik+lag+code PDF link annotation
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/e10f89f29a.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/sileb_sagopobitosuf_lusegabexonogaz.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/f65bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463808/normal_5fa2e8e5cb10e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f91035e16f7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c3f53a-8ba6-4b37-b946-846ec3866a73/padelopepelakat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4984a96f-6410-4ed8-9a53-ed00f58c1524/79022059704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d32517d-5cea-449c-931b-d3e563618020/wojajox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa47765-c3e0-4007-aaca-47e37a54259c/bodosojanijipaxotarukipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2daae189-d983-49d4-a9c1-6436509a4468/rusoledumezesojolebowakil.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/ancient_words_violin_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb62723-ae39-4db9-a778-0d50fdd9bbca/soborubasosubabibo.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_off00007485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7485 4868 bytes
SHA-256: d2b5ef13802b62c781b8aa92c31978130bf0d2fe565788431ec42fdb8c12cc0a
font_01_sfnt_off0000852a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 10156 bytes
SHA-256: 71ea2f3906c1688158135e1d59f3b6fbaeda83e84901ad9e7150bfc36ab20388

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