Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6cf986d8be820f…

MALICIOUS

PDF

57.1 KB Created: 2020-03-30 12:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4e2d915cbcc9e9cd58f40a45a93bd5f2 SHA-1: f1cd9747c4f9a3a7b4e663efbf05c1e1d4b90ebe SHA-256: 7e6cf986d8be820f7d6fed25ed036f998c1817963c4195ca28cd36780a0195d3
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 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 content distribution network. The document body, though partially corrupted, contains references to 'Herfindahl-hirschman index example' and the wkhtmltopdf generator, indicating it was likely programmatically generated. The primary attack pattern involves directing users to these external resources, which could host further malicious content or be used for SEO spam.

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://cecilyeiferle.com/uploads/1/3/1/4/131452961/131452961.html#herfindahl-hirschman+index+example
    • http://wildharboryachtclub.com/uploads/1/3/0/6/130604501/nalavubuxewet.pdf
    • http://emilyranney.com/uploads/1/3/0/7/130775511/segaxibime.pdf
    • http://diamondwoolpadco.com/uploads/1/3/0/6/130604394/4874960.pdf
    • http://davethielrenovations.com/uploads/1/3/0/3/130323455/1401705.pdf
    • http://congresodemaquillaje.com/uploads/1/3/0/5/130550992/99ccbf.pdf
    • http://caitlindoula.com/uploads/1/3/0/6/130639099/nebofin.pdf
    • http://johnnyallentennisacademy.com/uploads/1/3/0/6/130621352/zupufigogaravexegifu.pdf
    • http://maxconstruct.es/uploads/1/3/0/7/130740209/2316433.pdf
    • http://clatchetproductionsllc.com/uploads/1/3/0/5/130550663/17a1eb.pdf
    • http://drivegauge.com/uploads/1/3/0/6/130604958/gemifapofupej.pdf
    • http://blakekile.com/uploads/1/3/0/2/130272280/6871408.pdf
    • http://thegrampo.com/uploads/1/3/0/2/130288751/4386727.pdf
    • http://chantyogastudio.com/uploads/1/3/1/3/131380837/xesagurefefidedaguxi.pdf
    • http://yourstrulymegs.com/uploads/1/3/0/5/130545434/2445474.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000908b.bin
d0e928e892efa28a214386cb094eef3392ec2c8003bb32b23ed7631ab2d23497		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908B 9708 bytes
font_01_sfnt_off0000b537.bin
af26c02b74767f7ca76d60f08065a00f13215ed0088d175630ab6f36301193b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB537 3220 bytes
font_02_sfnt_off0000c0a0.bin
0242360b0495d593f84618b300486f02764db0abc874fcd80097196b127e7694		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A0 16288 bytes

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