Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8811725d357fc62…

MALICIOUS

PDF

40.6 KB Created: 2020-04-12 10:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 61bbbf316e608be2042cda2eb25cde7d SHA-1: 54ffcdf846499703f197d59f9fe3309cb47fafda SHA-256: a8811725d357fc62b476560f790369e89ada3e88d4c48c420074a289b06add56
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.001 PowerShell

The PDF file contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or SEO spam operation. The document body mentions a 'free knitted chevron blanket pattern', which serves as a lure to direct users to the embedded URLs. The primary heuristic indicates a PDF SEO link farm, with a dominant host of 'hay-fa.com'. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

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://thedogbedcompany.net/uploads/1/3/1/6/131606118/131606118.html#free+knitted+chevron+blanket+pattern
    • http://hay-fa.com/uploads/1/3/1/1/131164093/4466177.pdf
    • http://essenceofjoshuatree.com/uploads/1/3/0/8/130813866/a45ab.pdf
    • http://kajoda.com/uploads/1/3/0/9/130969954/lifakex.pdf
    • http://na5.bon-ha.de/uploads/1/3/0/6/130620407/237dd88.pdf
    • http://tinyhomecreative.com/uploads/1/3/0/9/130969130/perubija.pdf
    • http://jminvestmentplanning.com/uploads/1/3/1/4/131406226/gurakiposelenag_selogakixore_nisumodine_ramasakefizuke.pdf
    • http://lilihup.com/uploads/1/3/0/6/130621487/3800825.pdf
    • http://patapouf.de/uploads/1/3/0/6/130639223/mabifekivin.pdf
    • http://riverfrontpubandgrill.com/uploads/1/3/0/7/130739278/xaninagoxize.pdf
    • http://horizonsksu.com/uploads/1/3/1/4/131405976/nasajepefijotenagez.pdf
    • http://www.phktsda.com/uploads/1/3/0/7/130739376/kufusen_kowezafefogudav_latel.pdf
    • http://toreyfox.com/uploads/1/3/0/4/130478259/9979156.pdf
    • http://elegantartistries.com/uploads/1/3/1/4/131453246/zudizodomupewakoxe.pdf
    • http://adrianascamardi.com/uploads/1/3/1/3/131380689/napegalexoxen_wepufes.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_off00007733.bin
74369f4490741436dfc7bd7818c7fb5cfa68c4327c50c5e74b48e9b2cffae7b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7733 8028 bytes

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