Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82ce950161e022b…

MALICIOUS

PDF

42.5 KB Authoring application: Smallpdf Desktop
MD5: 7ab634af4aa2f279bba1367477804ec7 SHA-1: 56e03962f705be5b02d4af91f0c955457b054e21 SHA-256: b82ce950161e022b6eb9281e46d78a61adaa23099ee578af14b1b3d13c3c09bc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, also contains several of these URLs. This indicates a likely phishing or malware distribution attempt by directing users to a network of potentially malicious PDF files hosted on various domains.

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://joxapimige.toysrobocar.ru/uploads/2020/01/28/9eb7b9ac7.pdf
    • http://blowbyblowparty.com/uploads/1/3/0/6/130620305/7841547.pdf
    • http://mtsarmusic.com/uploads/1/3/0/5/130546118/3975520.pdf
    • http://gpufx.com/uploads/1/3/0/5/130545333/3494273.pdf
    • http://catalinalandscapedesign.com/uploads/1/3/0/5/130541763/ximarif.pdf
    • http://amudyomi.net/uploads/1/3/0/6/130605280/lalebokinumavoj_jekited_xejubumelovesus.pdf
    • http://ukulelebuyingguide.com/uploads/1/3/0/3/130313180/60899ea116f0494.pdf
    • http://undernolaws.com/uploads/1/3/0/6/130603932/mupegujasusa-nibelexetobago-gogudu.pdf
    • http://waitakaruruschool.com/uploads/1/3/0/7/130739234/xigubomagajutagolopo.pdf
    • http://ayanakyounglawllc.com/uploads/1/3/0/5/130551143/f588a1d7384dc.pdf
    • http://abraxasband.net/uploads/1/3/0/3/130313504/sikafadon_jawigebev.pdf
    • http://kheeterwgu.com/uploads/1/3/0/5/130542908/dosawotepe_faxepemo_bivabukika_rekog.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/7/130738955/130738955.html#wordscapes+answers+ravine+1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000134f.bin
923c7077f8fdeb403040ddf0ff7da39818d19be9e6cf416a9d4b00cc26fc4aa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134F 7896 bytes
font_01_sfnt_off00005f6a.bin
a68ad206e6fa00de9a93bcd426264e2a948f22db9431d90be7110a1ae082cbf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6A 16076 bytes

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