Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f27a5f7ca559ce1…

MALICIOUS

PDF

37.0 KB Created: 2020-04-08 21:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 40db7d653efec71a761771f2ce5de40c SHA-1: cf3d6a617536aa10e009fac8c6437acd74f99f2f SHA-256: 2f27a5f7ca559ce1c5f5d7c5515855305be6342e220328706ab5a857e3b438de
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a method to distribute malicious content. The document body, though partially corrupted, contains a reference to a multiplication worksheet, which is likely a lure to disguise the malicious nature of the links. No scripts were extracted, and the primary malicious activity appears to be the distribution of links.

Heuristics 3

  • 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
  • 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 http://moodlabnewlife.nl/uploads/1/3/0/4/130489262/130489262.html#single+digit+multiplication+workshee
    • http://multisplash.com/uploads/1/3/0/2/130270746/ninilexe_fajas.pdf
    • http://engagemke.org/uploads/1/3/0/9/130969631/4350010.pdf
    • http://staugustineccm.org/uploads/1/3/0/8/130874497/512146.pdf
    • http://browsenodeinfo.com/uploads/1/3/1/0/131070011/rejeze-xozutuwobesop-rodoremubutija.pdf
    • http://badwatersumtersc.com/uploads/1/3/0/2/130288510/wisurofekuxukejized.pdf
    • http://creamandtiger.com/uploads/1/3/0/6/130604295/nerak.pdf
    • http://ecreativegp.com/uploads/1/3/0/7/130775590/bogexetor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a25.bin
8450543300fabb19cbe94a5dbabe86ab6fcc3d0d04e4820ccb747b6a39502e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A25 7440 bytes

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