Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c3361871a3941f…

MALICIOUS

PDF

38.7 KB Authoring application: Pdftk
MD5: 0a19313c266bfaa304d617f2fccf7217 SHA-1: b6694c88b572c2e40a38ab91e8fde3af97509b2b SHA-256: 25c3361871a3941f018058a2560f104b396e5a1f808c9f2353141bff65a34da1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, a technique commonly used for SEO poisoning or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely part of a campaign to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mightyjunior.com/uploads/1/3/0/3/130379424/mixafulow.pdf
    • http://sfte-seattle.org/uploads/1/3/0/7/130776446/82ca59731da.pdf
    • http://rebuildcm.co/uploads/1/3/0/7/130739928/nusuzowenuwonotizev.pdf
    • http://silverwoodnorth.net/uploads/1/3/0/4/130478709/06c8376afd11e8.pdf
    • http://molliemonahan.com/uploads/1/3/0/8/130814553/gutinara.pdf
    • http://portagejiu-jitsu.net/uploads/1/3/0/5/130547486/17b39dee3221f46.pdf
    • http://timtosuccess.com/uploads/1/3/0/6/130640063/gobemax.pdf
    • http://mycokosmos.org/uploads/1/3/0/7/130740420/217f9a0.pdf
    • http://grannys-garden.com/uploads/1/3/0/5/130588936/7e3241ca.pdf
    • http://jrcommercial.com/uploads/1/3/0/8/130873861/161980e1252.pdf
    • http://carlsbadcleaningservices.com/uploads/1/3/0/5/130551206/mizuguwoxetev.pdf
    • http://amywoodsbooks.com/uploads/1/3/0/6/130604759/1cc988996eadf.pdf
    • http://webmail.maderabc.com/uploads/1/3/0/8/130874097/130874097.html#resistance+band+exercises+for+shoulders
    • http://sfte-seattle.org/uploads/1/3/0/7/130776446/82c

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002acd.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACD 16036 bytes
font_01_sfnt_off0000418d.bin
cf8b9d42e7362732d2705c2ab3971f8156b19c3c2eea1969cdb093a92b858bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x418D 7216 bytes

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