Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa55997359add8cc…

MALICIOUS

PDF

35.1 KB Authoring application: LibreOffice First seen: 2020-09-24
MD5: 8055c76d04c9c3e23e6cadbb3b0a6d85 SHA-1: 3121d359820f71f1661cef1697677d8cbfa0fbc1 SHA-256: aa55997359add8cc0c3cbf5d07a753904485050737eb4efe2321164bbf0bb42b
152 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.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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 In PDF document text
    • http://casarefugiopa.org/uploads/1/3/0/2/130271209/venedobidov-tinav-jexilalufadolu.pdfIn PDF document text
    • http://dirtroaddanes.com/uploads/1/3/0/6/130639720/ruvobamewib_jivopeforo_lujijini.pdfIn PDF document text
    • http://fbcnewton.net/uploads/1/3/0/3/130323750/zuvewavutomafiwu.pdfIn PDF document text
    • http://journeytosimplicity.org/uploads/1/3/0/6/130605084/5986839.pdfIn PDF document text
    • http://surnamesonline.com/uploads/1/3/0/6/130621980/1281913.pdfIn PDF document text
    • http://midnightjusticefilms.info/uploads/1/3/0/5/130539449/rosafewika_waderefole_towabekugunas_fudujowowodo.pdfIn PDF document text
    • http://www.gayejee.com/uploads/1/3/0/4/130483862/kuwiwubitegim_kalasanijuta_dinatetejowi.pdfIn PDF document text
    • http://albancityplumbing.co.uk/uploads/1/3/0/6/130604013/e1344d.pdfIn PDF document text
    • http://nityakumar.com/uploads/1/3/0/6/130620314/5118497.pdfIn PDF document text
    • http://inscienceitrust.net/uploads/1/3/0/4/130435960/selakanivole-pelimamobugolig.pdfIn PDF document text
    • http://mta-sts.mail.cloverealty.com/uploads/1/3/0/4/130489475/3763578.pdfIn PDF document text
    • http://74-123-75-191.mgwnet.com/uploads/1/3/0/5/130588659/130588659.html#acute+motor+axonal+neuropathy+prognosisIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D3 8368 bytes
SHA-256: 891440a80cb33de4e146587d5a338b56010130baec427c72d866e244dd499dca

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