Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea345ab46bb61ab…

MALICIOUS

PDF

37.8 KB Authoring application: Pdftk
MD5: f1f0f8fc03cbfa1e9a726015a090ced5 SHA-1: 6ce755aff790aa9483f82c6e82a646ffe9bd4824 SHA-256: fea345ab46bb61ab808ce98261494c8b1d7392532ec0a5f23df8a55d4d98cf0a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate malicious intent. The document body, though partially corrupted, mentions 'Sintomas cancer de estomago pdf', suggesting a lure related to health information to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://dermaoptika.com/uploads/1/3/0/8/130814967/guripubunizusefu.pdf
    • http://changeyourquestionschangeyourlife.com/uploads/1/3/0/6/130604433/binebetiforefa.pdf
    • http://ideas4entrepreneur.com/uploads/1/3/0/6/130620168/7816927.pdf
    • http://suicidepreventionproject.com/uploads/1/3/0/4/130475883/6573983.pdf
    • http://fly360green.org/uploads/1/3/0/5/130589354/3608454.pdf
    • http://code-camp.ru/uploads/1/3/0/6/130621238/5f3569f56.pdf
    • http://aaroncharlesg.com/uploads/1/3/0/4/130476395/4149432.pdf
    • http://puppyoncamera.com/uploads/1/3/0/2/130271113/1267404.pdf
    • http://londonbombsites.com/uploads/1/3/0/6/130622073/7a07c5ba046ee.pdf
    • http://theladdsgroup.com/uploads/1/3/0/3/130323811/2083742.pdf
    • http://davidquy.com/uploads/1/3/0/2/130270902/0c77be.pdf
    • http://drkronos.ru/uploads/1/3/0/8/130813448/633928.pdf
    • http://cpanel.stefanaarnio.com/uploads/1/3/0/6/130603926/130603926.html#sintomas+cancer+de+estomago+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003b80.bin
9dcb79349ef49ab113ad47a2926be326c93d783787023a22669807f4077b1864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B80 8736 bytes

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