Malicious PDF — malware analysis report

Static analysis result for SHA-256 2180974bd4a2c5ad…

MALICIOUS

PDF

36.3 KB Created: 2020-10-31 05:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7a923720472e1b088c7be32f3f70d705 SHA-1: df3cbcd7fc90016efcea95bf9dfdb13cd7f3efa4 SHA-256: 2180974bd4a2c5ad79dc639fd3ea32b77549c5892ca4e5f005033a7d69246ddc
162 Risk Score
Tags
free-cdn-ebook-manual-lure

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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=reinventing+your+life+pdf+download In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.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/635a35cc-b8e7-4352-8208-bef998127e18/42089222541.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/an_introduction_to_multivariate_statistical_analysis_download.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/rurefoxituze.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/27778779934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466d81e5-f6ed-4dd1-a80d-481a1f932c13/xoramidi.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/bulking_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/95422366920.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/68688078809.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/nakonume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad100591-865a-4dfa-aa54-73bfbe106521/31577908234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4895f336-04aa-4c32-b53e-dedea827c3fa/11470867933.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_off00004e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E21 5292 bytes
SHA-256: b043fb99d9eee9fa03810a9cf81db07d6a2fbba8871036df8711c6c4a7856e3a
font_01_sfnt_off00006059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 10636 bytes
SHA-256: 6ed1ea24c43292bf866273d537eacd384f3cd069d78f0e1973cc27760f3426b8

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