Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7a29e95b3d5e77…

MALICIOUS

PDF

75.9 KB Authoring application: Mobipocket Creator
MD5: df30fcb771dee93ed01322600954d748 SHA-1: 4b0473817eb59cc21a9eb1fe7bfa63a9b527089a SHA-256: 9e7a29e95b3d5e777fcd6f2fdf34d2929893c326557ccd85dfc57e90c122ccdf
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. These URLs point to various domains, suggesting a link farm or a distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

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://dirosastudiolegale.com/uploads/1/3/0/6/130604030/zugujavo.pdf
    • http://jayexner.com/uploads/1/3/0/3/130323748/nixirotur_wokumibajusojum_fuwupixo_darum.pdf
    • http://structureinsurancegroup.com/uploads/1/3/0/5/130588789/8471742.pdf
    • http://fif.biletkaspitur.online/uploads/2020/01/28/eae4da9.pdf
    • http://kuwtjd.com/uploads/1/3/0/5/130550867/8416523.pdf
    • http://sandandgraveldelivery.com/uploads/1/3/0/6/130605083/pekafubefago.pdf
    • http://mrgn.marketing/uploads/1/3/0/4/130490056/pegojomopakigagala.pdf
    • http://modafabrictreasure.co.uk/uploads/1/3/0/6/130605248/binug.pdf
    • http://rogik.tapuzik.com/uploads/2020/01/29/kidafi-setuto.pdf
    • http://richardbrooksinvestigations.com/uploads/1/3/0/5/130543239/cdcded47baecdb4.pdf
    • http://sharedtravel.voyagerwebsites.com/uploads/1/3/0/2/130270924/130270924.html#esc+heart+failure+guidelines+2012+pdf

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000135d.bin
db3222602f7e02d211d13acd897253e8d5c80aea615836187c346382bc025e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135D 8552 bytes
font_01_sfnt_off0000db60.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 16204 bytes
font_02_sfnt_off0000f03b.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 2600 bytes

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