Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a17cb023b073e6…

MALICIOUS

PDF

40.5 KB Authoring application: OpenOffice Draw
MD5: c991613b550437898840296c7fa357ea SHA-1: 3913f116a417eb5f9406a766b39056729a3af11b SHA-256: 59a17cb023b073e67a60e1d9be2578dd9e5fff156bfd8a67b4f566987af9f774
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for PDF_SEO_LINK_FARM. The primary malicious URL, http://idokhvshop.ru/uploads/2020/01/27/ccfb306.pdf, is embedded within the document body and is also listed as a heuristic finding. ClamAV also detected this file as Pdf.Phishing.TtraffRobotInstall-7605656-0, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://idokhvshop.ru/uploads/2020/01/27/ccfb306.pdf
    • https://moxinatuzar.weebly.com/uploads/1/3/0/2/130272319/fanoneg.pdf
    • http://southwestflaadom.org/uploads/1/3/0/2/130287257/312757.pdf
    • https://salamepipirekab.weebly.com/uploads/1/3/0/2/130271206/494a97dbd5e5aa7.pdf
    • https://zifogizaluj.weebly.com/uploads/1/3/0/5/130551391/9048269.pdf
    • http://pluralform.se/uploads/1/3/0/4/130490421/pomeja.pdf
    • http://mozziemotorsports.com/uploads/1/3/0/5/130589009/sofafuzejujavufe.pdf
    • https://xuvalisunoz.weebly.com/uploads/1/3/0/2/130270879/verinemorizibujes.pdf
    • http://pikinejum.rucrime.top/uploads/2020/01/27/vunofivageribagajira.pdf
    • http://fivu.rus-snow.ru/uploads/2020/01/29/tukewufiralevog.pdf
    • http://kepler-associates.com/uploads/1/3/0/6/130639318/130639318.html#password+hash+decrypter

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001251.bin
38ce10911b6e0aa2f78e072c56ca8baef049651a21530b9cf6a11bcb789c39d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1251 8276 bytes
font_01_sfnt_off000057de.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DE 16068 bytes

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