Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d23a1b58e8f9c02…

MALICIOUS

PDF

58.9 KB Created: 2020-05-17 19:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d83437ae6524ffbec1de2b64dc7dea3 SHA-1: 12fd7da48f9c57e30457b822ada1f1d452ae167f SHA-256: 9d23a1b58e8f9c02636a2bbf030968bbd5e8133244b4259bc858567548d47bc0
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to various domains, many of which appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a coordinated effort to manipulate search engine results or distribute content across many sites. The primary URL found, http://popjetfountain.com/uploads/1/3/0/7/130739624/130739624.html#biochemistry+and+biophysics+reports+impact, is also part of this pattern. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact nature of the lured content beyond it being part of a link farm.

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://popjetfountain.com/uploads/1/3/0/7/130739624/130739624.html#biochemistry+and+biophysics+reports+impact
    • http://davediamond.info/uploads/1/3/1/3/131398015/misosorotapadivor.pdf
    • http://mayusilkart.net/uploads/1/3/0/6/130604213/cb61b26.pdf
    • http://megsegal.com/uploads/1/3/0/4/130483872/3289309.pdf
    • http://alanhagman.com/uploads/1/3/1/0/131070490/pudabexusurelur-fovanobi.pdf
    • http://tampabayplasticsurgery.net/uploads/1/3/0/7/130776605/lozevivibifa_sowipasaragopib.pdf
    • http://1815cio.org/uploads/1/3/1/4/131437359/kokusuvamasesikolumi.pdf
    • http://alexwoodsoutdoors.com/uploads/1/3/0/7/130739559/2931234.pdf
    • http://growerconsultants.com/uploads/1/3/0/6/130604855/5320035.pdf
    • http://howellbridgefinancing.com/uploads/1/3/0/5/130590687/midinonuvulo_jazikaxavi_ninowejurixif_xevaxurovedo.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_off00005ec3.bin
17903513fdbbb55c3b26356926dafceb47b1d89702ac1a1694400cdf3c966b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC3 21944 bytes
font_01_sfnt_off0000a536.bin
77642c2e5eecec9dbed7ce8324d6d6648d995cb7d3a8134850a594758b90adf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA536 11144 bytes
font_02_sfnt_off0000cad3.bin
3c1c7bd747a9a8f6e1c531457064e9378d9a893e5271ac7381d9d0015290d8f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD3 16088 bytes

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