Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2bbb20f7c7db77…

MALICIOUS

PDF

36.8 KB Created: 2020-03-19 03:29:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7831f3ce32fd0eb1e41ba1ed8961ab23 SHA-1: 1522656bc27e67d1ed196e0c360945cff7cf3c6c SHA-256: cf2bbb20f7c7db77da62d140877ca5d9bbdd9e2f518f245f10389b4a37a29722
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, 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 distribution mechanism for further malicious content. No scripts were extracted from this sample, and the document body is heavily obfuscated, making it difficult to determine the exact user-facing lure.

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://helpingsolutions.net/uploads/1/3/0/6/130621310/130621310.html#mercader+de+venecia+barcelona+muebles
    • http://www.auoctrainingdept.com/uploads/1/3/1/0/131071037/fc40f.pdf
    • http://byella.net/uploads/1/3/0/4/130488114/c54030fa.pdf
    • http://redeemingroots.org/uploads/1/3/0/4/130436357/9564299.pdf
    • http://lisatroutman.com/uploads/1/3/0/7/130739443/lapimajaxox.pdf
    • http://www.bluthirty2.com/uploads/1/3/0/5/130539774/jinonologomebifapi.pdf
    • http://jjandbabyu.com/uploads/1/3/0/5/130541103/gulolixavipawo.pdf
    • http://sellahouseorapartments.com/uploads/1/3/0/2/130287457/2f37a59758.pdf
    • http://q1ipv.dtmgt.com/uploads/1/3/0/7/130740060/9086948.pdf
    • http://virtualsaguaroapps.com/uploads/1/3/0/4/130477702/wazef.pdf
    • http://ruthandvalentina.com/uploads/1/3/0/5/130589452/pefijaretuj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054fa.bin
7a843bb0659ad24ef7b1bec2b3f906703095db2bbaa74f69043a96658370da4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54FA 9372 bytes
font_01_sfnt_off0000758d.bin
b64d6741cfec0aad0865d017b05e0e1fb7b4a6100249b802a3843c97d8d05181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758D 4552 bytes

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