Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c70d4fade195417…

MALICIOUS

PDF

34.4 KB Authoring application: Adobe PDF Library 9.0
MD5: e749db1eb1674538310181c691c8d23d SHA-1: d1b8859f44b89476472fa0f12678e73b47fa1ea9 SHA-256: 1c70d4fade195417b12e454968b877686d480276cbc4f2577460300662bfde68
152 Risk Score

Malware Insights

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

The PDF contains a link farm of external PDF files, masquerading as ACCA mock exam materials to entice users to download them. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely serving further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nadinesteklenski.com/uploads/1/3/0/2/130289755/6e8c2227829d3.pdf
    • http://storeoutsideyourdoor.com/uploads/1/3/0/3/130323130/37e7323d76059.pdf
    • http://modernessencestore.com/uploads/1/3/0/5/130550855/wowuwaguvuru-rivokedufimowi-buziralemovimo-gixofosinos.pdf
    • http://alicelandry.com/uploads/1/3/0/4/130489262/6413977.pdf
    • http://bezzies-bakery.com/uploads/1/3/0/4/130436252/gegowegawawe-lulojivapi-rexuxulosopiv-sevegegod.pdf
    • http://newperspectivemedical.com/uploads/1/3/0/7/130775725/130775725.html#acca+f5+mock+exam+bpp

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000111a.bin
1facaed202da75817a195d29261efe8bb75a2d6d31d6872afa495d280a13cf55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A 8504 bytes

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