Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbb59c801d4dcb8…

MALICIOUS

PDF

37.3 KB Authoring application: OpenOffice Draw
MD5: 65481705bcc64e49a9bddc810f895804 SHA-1: c21b42a7452fa1ce0f7a0483a90402b847dc1594 SHA-256: 7cbb59c801d4dcb804aa015ca56af0b2c464b4a9dbdd2eaed07a085b18c4c898
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. The document body itself is heavily obfuscated and contains a mix of text and what appears to be malformed data, but it does contain the same URLs as the embedded 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.
  • 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://foj.2diamond.ru/uploads/2020/01/27/58106.pdf
    • http://christinecarson.net/uploads/1/3/0/6/130604692/pelunamone.pdf
    • http://lemaneru.janderu.xyz/uploads/2020/01/27/2124709.pdf
    • https://kitowafarok.weebly.com/uploads/1/3/0/3/130379386/34698e8.pdf
    • http://numaluvuf.familiarizarse.info/uploads/2020/01/28/lubur.pdf
    • http://nixufolu.kvipa.ru/uploads/2020/01/27/rutitegaxibud.pdf
    • http://revendainstagram.com/uploads/2020/01/27/b9deeb9d41.pdf
    • http://xiwex.grink.icu/uploads/2020/01/28/jujikumepolez.pdf
    • http://heartsofpaw.com/uploads/1/3/0/4/130488539/jowupewori.pdf
    • http://bazetapav.olympgood.club/uploads/2020/01/28/setovarowofoku_lokoke.pdf
    • http://un-mariage-a-la-reunion.fr/uploads/1/3/0/3/130323547/siloki.pdf
    • http://ninetysix96.com/uploads/2020/01/28/mudawitigipebagujiwo.pdf
    • http://quillylife.com/uploads/1/3/0/6/130620604/130620604.html#felatun+bey+ile+rak%C4%B1m+efendi

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001373.bin
054a1f8e29135a804b787493099196cae0b000451e6ab3fd0c1bd31ea589f816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1373 10092 bytes

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