Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf618438f07907b…

MALICIOUS

PDF

79.4 KB Authoring application: PDFedit
MD5: bc4f289449d5005ef4a8de4f6452752f SHA-1: eac0a020379d8d452efeb9150f4482cf4bf6340e SHA-256: 3cf618438f07907bad657214ae56f84c47642ee821ece1d6f95ae66c20ed93f2
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely used to distribute further malicious content or lead to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://kitpsychiatriccenter.com/uploads/1/3/0/7/130740184/golaxaj-rolusedepus-sosub-vapoparetenuxas.pdf
    • http://camelcottage.com/uploads/1/3/0/6/130621003/0669af078e7215.pdf
    • http://carnegieam.org/uploads/1/3/0/6/130604537/muzetumejekekagepa.pdf
    • http://kiw.urogorod.ru/uploads/2020/01/28/wegotexuxiwibix-tagikosil-golig-sezedoxixesane.pdf
    • http://magnabait.net/uploads/1/3/0/3/130323555/9157453.pdf
    • http://mhessential.net/uploads/1/3/0/5/130588475/df20cb21.pdf
    • http://kimchibabe.com/uploads/1/3/0/4/130435650/bcc40d.pdf
    • http://narvaezabogados.com/uploads/1/3/0/5/130590043/reran-jewikabebirofu-gonuxegi-wogamugaxuro.pdf
    • http://bejustalittlebetter.com/uploads/1/3/0/7/130775259/130775259.html#islamic+dua+ahad+nama

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000d66c.bin
8334f73270aec369df32bee32a29e47e0744710ec5b158ee2b80d27088a289e0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD66C 30732 bytes
font_00_sfnt_off000012b2.bin
51a2f32ceed8f29eef9f739242cc127c310ef336aed1315ae13c89fe1e8b05d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2 9776 bytes

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