Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaeb457a7de10ca…

MALICIOUS

PDF

41.5 KB Created: 2020-10-03 04:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 72944b4093ffc2c48e4ff1f2a5d148d0 SHA-1: 520c5d9a2a6c86391625d9e3de64fdf2192b6738 SHA-256: fbaeb457a7de10ca3c15f1c72160618c352ff2a10f25859c7f8e55bf35dc92a8
162 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, 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=hamoodur+rehman+commission+report In PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/36480347181.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/30331962395.pdfIn PDF document text
    • https://site-1038600.mozfiles.com/files/1038600/13241035113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1432/0038/files/liwilafikidasipiwiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0697/1032/files/71216101188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2505/7957/files/9190336840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8007/0821/files/similarities_between_linear_and_exponential_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/4617362308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4106/5630/files/begedazupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2089/files/a_child_called_it_summary_sparknotes.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_off0000642e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642E 5244 bytes
SHA-256: 92862be458f141788f9f8c3acb3fef68f4a412c96aec5f8d417a8acbb20ac621
font_01_sfnt_off000075ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CE 11136 bytes
SHA-256: a9e2142736497bda089fe06a811bd6e8af45418d28e6f142507de0f1c7c6a438

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