Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa55997359add8cc…

MALICIOUS

PDF

35.1 KB Authoring application: LibreOffice
MD5: 8055c76d04c9c3e23e6cadbb3b0a6d85 SHA-1: 3121d359820f71f1661cef1697677d8cbfa0fbc1 SHA-256: aa55997359add8cc0c3cbf5d07a753904485050737eb4efe2321164bbf0bb42b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of Pdf.Phishing.TtraffRobotInstall-7605656-0 further supports a malicious classification. The embedded URLs are likely used to distribute phishing content or for SEO poisoning to drive traffic to malicious sites. No scripts were extracted from this sample.

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://sherburnelectronics.com/uploads/1/3/0/7/130775076/8329530.pdf
    • http://casarefugiopa.org/uploads/1/3/0/2/130271209/venedobidov-tinav-jexilalufadolu.pdf
    • http://dirtroaddanes.com/uploads/1/3/0/6/130639720/ruvobamewib_jivopeforo_lujijini.pdf
    • http://fbcnewton.net/uploads/1/3/0/3/130323750/zuvewavutomafiwu.pdf
    • http://journeytosimplicity.org/uploads/1/3/0/6/130605084/5986839.pdf
    • http://surnamesonline.com/uploads/1/3/0/6/130621980/1281913.pdf
    • http://midnightjusticefilms.info/uploads/1/3/0/5/130539449/rosafewika_waderefole_towabekugunas_fudujowowodo.pdf
    • http://www.gayejee.com/uploads/1/3/0/4/130483862/kuwiwubitegim_kalasanijuta_dinatetejowi.pdf
    • http://albancityplumbing.co.uk/uploads/1/3/0/6/130604013/e1344d.pdf
    • http://nityakumar.com/uploads/1/3/0/6/130620314/5118497.pdf
    • http://inscienceitrust.net/uploads/1/3/0/4/130435960/selakanivole-pelimamobugolig.pdf
    • http://mta-sts.mail.cloverealty.com/uploads/1/3/0/4/130489475/3763578.pdf
    • http://74-123-75-191.mgwnet.com/uploads/1/3/0/5/130588659/130588659.html#acute+motor+axonal+neuropathy+prognosis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d3.bin
891440a80cb33de4e146587d5a338b56010130baec427c72d866e244dd499dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30D3 8368 bytes

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