Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc5f4d30370d878…

MALICIOUS

PDF

35.2 KB Authoring application: QPDF
MD5: 9ac7f944f3eb0360a6b218ae77298b68 SHA-1: 1cdfeca80322e8ad95945c8c52f58a0016ffd558 SHA-256: 0fc5f4d30370d878476c07b04fbfdfa3b23e5b7f15c82297831328c0b73182e7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were explicitly extracted, the structure suggests a phishing or SEO spam campaign designed to drive traffic to numerous external PDF documents.

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://torontolifeguarding.com/uploads/1/3/0/7/130776346/2031712.pdf
    • http://www.kebenterprisesllc.com/uploads/1/3/0/5/130550830/394b2715c33.pdf
    • http://fiam.fiam.info/uploads/1/3/0/6/130639410/6471251.pdf
    • http://baniphonecu.com/uploads/1/3/0/4/130476691/noriko.pdf
    • http://fit4tots.co.uk/uploads/1/3/0/6/130621215/8548340.pdf
    • http://80at294.com/uploads/1/3/0/2/130272442/belumalijala.pdf
    • http://chloe-communications.com/uploads/1/3/0/7/130775328/85dd03e053.pdf
    • http://hizmetalimi.com/uploads/1/3/0/2/130288412/3206685.pdf
    • http://www.mikescottthomson.com/uploads/1/3/0/6/130621131/b0bd09d99ea62.pdf
    • http://goss-p.com/uploads/1/3/0/2/130288462/e79c46bb2069.pdf
    • http://wasatchdiaperbank.com/uploads/1/3/0/5/130545597/zenarorar.pdf
    • http://usanewbiology.com/uploads/1/3/0/4/130476830/a70f24bbc5466.pdf
    • http://sewdivinecreations.com/uploads/1/3/0/6/130620437/xomabi-gideloza.pdf
    • http://converyinvest.com/uploads/1/3/0/6/130621800/8261462.pdf
    • http://p8w9b6.salon225.com/uploads/1/3/0/6/130604894/130604894.html#renewal+tenancy+agreement+sample+letter

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003299.bin
c41d04ed7051c90232037c8a6100f1e897819f3ebfeca831313d99e9ecf033da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3299 7016 bytes

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