Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2bf0d1683d61be…

MALICIOUS

PDF

39.0 KB Authoring application: Nitro PDF
MD5: 90807d67c03318be488a9dd63fc2aa80 SHA-1: f713c331cfd04e3c279e958387ce1cf76d37b36b SHA-256: 2a2bf0d1683d61be393a8eb705652019fb20f9e108da89f0fde104e67c05f22b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection also flags this as a phishing-related PDF. The document body, though heavily obfuscated, contains references to 'Nitro PDF' and 'Minecraft cruise ship map', suggesting a lure to entice users to click the embedded links. The primary attack pattern involves directing users to these external resources, which are likely malicious.

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://mystarcleaner.com/uploads/1/3/0/2/130272072/d010eb1f4.pdf
    • http://knutsonconsulting.com/uploads/1/3/0/5/130588347/rabume_timedin_gopid.pdf
    • http://sharkineurope.com/uploads/1/3/0/6/130622091/gejaw_wuzedizuzofubo.pdf
    • http://wobowis.audiostart16.icu/uploads/2020/01/28/2152295.pdf
    • http://kyterapia.com/uploads/1/3/0/4/130476910/boxolusazasevorodizo.pdf
    • http://ownyourlinemtb.com/uploads/1/3/0/6/130620572/zupejene.pdf
    • http://mysoundcollective.com/uploads/1/3/0/7/130740349/130740349.html#minecraft+cruise+ship+map

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000114b.bin
76fb6dba013cb6fd562fd2ae9acf9beb2f95d0356724f1a2f420b81886384544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B 8996 bytes

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