Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecf35044d6ef68f…

MALICIOUS

PDF

31.4 KB Authoring application: Pdftk
MD5: 24f7107b3932522b8528abe1a0a1564f SHA-1: edfeebabe5d2178fd447b671e5cbcfca01c783d4 SHA-256: fecf35044d6ef68f640716ec582aa92530b6af45c0e5dc9e6ae1b73b28388540
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, as detected by the PDF_SEO_LINK_FARM heuristic. This technique is often used for SEO manipulation or to distribute malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted from this sample, but the extensive link farm suggests a phishing or content distribution attack pattern.

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://annaedgell.com/uploads/1/3/0/7/130739373/2d085446d737b.pdf
    • http://www.bridalife.co.uk/uploads/1/3/0/2/130271132/sufunetugi.pdf
    • http://www.matthew-shih.com/uploads/1/3/0/3/130323216/girerubosomiwe_bogedo_pilesatexobo.pdf
    • http://www.yeahbuddyonline.com/uploads/1/3/0/5/130545581/jamajovasez_muligowo.pdf
    • http://derryfieldrepertorytheatre.org/uploads/1/3/0/5/130551391/sorizub.pdf
    • http://advantageinsuranceagency.net/uploads/1/3/0/5/130543158/mewoxerozusera.pdf
    • http://ymagofficial.com/uploads/1/3/0/6/130604656/6852884.pdf
    • http://rncheadquarters.com/uploads/1/3/0/3/130379912/wimewijevim.pdf
    • http://www.blondemartini.com/uploads/1/3/0/5/130539899/vedaxopiwexemexiv.pdf
    • http://ohioawnings.com/uploads/1/3/0/2/130272524/rosudolaluluju_jokabaleva_zuwinafapa_kenaxoluxuje.pdf
    • http://kslscf.org/uploads/1/3/0/3/130313044/2595172.pdf
    • http://ckpublishing.org/uploads/1/3/0/7/130775328/pinaguxafapib_lesivafabibepa_zezoben.pdf
    • http://yourdedicatedtravelagent.com/uploads/1/3/0/2/130288559/xefuwa_sobus_sufolitano.pdf
    • http://mickiscleaningservices.com/uploads/1/3/0/8/130874489/8e5e04d.pdf
    • http://three54.com/uploads/1/3/0/5/130589334/bilutaganunipup.pdf
    • http://vleo.brdge.org/uploads/1/3/0/4/130475981/130475981.html#cpr+tutorial+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000021d2.bin
c43512a187aa934ec524cdc41f9b510dc7a41a32efbfd21d7910845d1323f69d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21D2 7048 bytes

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