Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b643b78b4dacb5…

MALICIOUS

PDF

50.9 KB Authoring application: OpenOffice Draw First seen: 2020-09-24
MD5: b3d1dfe4cc6a8140ee2927a5a3df7909 SHA-1: 8bd91e2b6669971e869af2bffc2a6435663c2008 SHA-256: b1b643b78b4dacb5e2e7f5f4682bb13a72a758304ee64a52d6d2a37865c2c00d
152 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, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. No scripts were extracted, and the document body was heavily obfuscated, preventing a more detailed analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://www.mkjsolutions.com/uploads/1/3/0/5/130590177/1780139.pdf In PDF document text
    • http://negocioscontra.com/uploads/1/3/0/7/130740097/lejike.pdfIn PDF document text
    • http://alcoholfree.beer/uploads/1/3/0/2/130272333/6239712.pdfIn PDF document text
    • http://nonreligiousspiritual.com/uploads/1/3/0/2/130272072/6330919.pdfIn PDF document text
    • http://bergersolutions.co/uploads/1/3/0/3/130323115/3538294.pdfIn PDF document text
    • http://www.freedomair.net/uploads/1/3/0/3/130313491/ebd3b31441.pdfIn PDF document text
    • http://myenvisionphotography.com/uploads/1/3/0/5/130550956/2834134.pdfIn PDF document text
    • http://norcal-cre.com/uploads/1/3/0/7/130776529/1223341beb3.pdfIn PDF document text
    • http://thejohns.co.uk/uploads/1/3/0/4/130488979/dukamijoguxusigakesa.pdfIn PDF document text
    • http://www.scinovay.com/uploads/1/3/0/6/130640104/vutiwokosubax_famozewanopipil.pdfIn PDF document text
    • http://njointeriors.com/uploads/1/3/0/7/130776605/6055817.pdfIn PDF document text
    • http://offthepier.net/uploads/1/3/0/5/130589264/2666039.pdfIn PDF document text
    • http://mrpsmathclass.com/uploads/1/3/0/6/130639797/luzinojegorovu.pdfIn PDF document text
    • http://www.littleyogis.co.uk/uploads/1/3/0/6/130621771/barekofitom.pdfIn PDF document text
    • http://mta-sts.mx.letiziaiannaccone.com/uploads/1/3/0/9/130969825/130969825.html#cholinesterase+inhibition+alzheimer%27s+diseaseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000532e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532E 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
font_01_sfnt_off00006aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEF 9184 bytes
SHA-256: 568bb5adc6d845442eeb441eb7305ed3ab6faf164d0a727f0796cb8126762a09

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