Malicious PDF — malware analysis report

Static analysis result for SHA-256 94143e0c591fb920…

MALICIOUS

PDF

35.6 KB Authoring application: Karbon
MD5: 1f5419f6fabcdda35786a94632342b52 SHA-1: b1927763e3e0f14dbca34767e1afe18249e06824 SHA-256: 94143e0c591fb92097677305f6834cab70a4f36f542997aa18b36e31a6fba7f1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits a PDF_SEO_LINK_FARM heuristic. This indicates the document is likely part of a phishing or SEO spam campaign, leveraging numerous external links to potentially malicious PDF files. The embedded URLs suggest a distribution mechanism for further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://beachmedicalservices.com/uploads/1/3/0/3/130312961/kifamojeze.pdf
    • http://rozkalnikina.weebly.com/uploads/1/3/0/6/130604273/6074545.pdf
    • http://vot.q-rp.ru/uploads/2020/01/27/e59de5f.pdf
    • http://bkcyouth.org/uploads/1/3/0/4/130436402/15b91.pdf
    • http://zanove.shoop-goo.info/uploads/2020/01/29/vulodunemulu-timuxix-jezebed-xaxibajegij.pdf
    • http://kivon.kinotani.icu/uploads/2020/01/28/lunisipumab-vodizavifunovaw.pdf
    • http://shnhome.com/uploads/1/3/0/4/130476214/gawimolate.pdf
    • http://connexionadr.com/uploads/1/3/0/4/130483552/145462df889b98.pdf
    • http://nemozudona.jnbusiness.services/uploads/2020/01/29/446931.pdf
    • http://ompeacelove.com/uploads/1/3/0/6/130620737/xafememufozu.pdf
    • http://pdazip.ru/uploads/2020/01/27/0ea2e26ff0.pdf
    • http://mrcrosbyswebsite.com/uploads/1/3/0/3/130323811/70d919bde51.pdf
    • http://antiviruseprotectserviceonline.site/uploads/1/3/0/2/130272325/130272325.html#protect+sheet+in+excel+online

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012bf.bin
02907090444895d7b3a8f4ac4e9967e6ddd25c2682e0e7ed6e5cd4f3a899486c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF 7676 bytes

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