Malicious PDF — malware analysis report

Static analysis result for SHA-256 d298dfef8d6ebee0…

MALICIOUS

PDF

39.7 KB Authoring application: OpenOffice.org
MD5: a2908772d8e51291b45962b2f3ba5a98 SHA-1: 4d5362996f680fbb4ae98056ab19917eda785b2e SHA-256: d298dfef8d6ebee0dabb6d391177ffb5e358d5934e49b17704a9c837e609b153
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique commonly used in SEO link farms for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to document manipulation, likely to trick users into downloading the linked malicious PDFs.

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://greaterglenwood.org/uploads/1/3/0/6/130604279/naxegubowulunar_kelosit_pezenuxa_soxejulebowugut.pdf
    • http://samba.company/uploads/1/3/0/2/130287266/vufafiketowuxa.pdf
    • http://thespeechteach.com/uploads/1/3/0/3/130313605/d6e7c4f3c5dd7e.pdf
    • http://cielosustentable.com/uploads/1/3/0/2/130287238/minokef_teviroja_noxirotosalot_bulilota.pdf
    • http://medicalmalpracticegeorgia.com/uploads/1/3/0/7/130776474/d84e907.pdf
    • http://postboxsucks.com/uploads/1/3/0/7/130775704/falukukixid_telenowosiru.pdf
    • http://bcummings4.com/uploads/1/3/0/8/130814421/8066969.pdf
    • http://robertoribeiro.net/uploads/1/3/0/6/130620512/e2650108.pdf
    • http://mikkelsendigital.com/uploads/1/3/0/7/130738667/1231635.pdf
    • http://craikpa.net/uploads/1/3/0/5/130551279/0e53cc7805147.pdf
    • http://eg8ldp.salon225.com/uploads/1/3/0/6/130620594/130620594.html#add+pdf+in+word+document
    • http://samba.company/uploads/1/3/0/2/130287

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004468.bin
75d47a615ce3bb4ab033153ed2bce38d1e64c3c5f7d7d13aa061d961ac1a0cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4468 8284 bytes

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