Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c23106fee5be9d…

MALICIOUS

PDF

39.6 KB Authoring application: pdf-parser
MD5: 1c275490f165c5d60fdac553ee778d08 SHA-1: 18d5f10bbd83ae86f2ae3ec64a4c4c38b71a178d SHA-256: 43c23106fee5be9d970f4f3d555b2fc86a67bcc71209ed331e4749a712204014
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external PDF links, with 'megadromlabs.com' being the dominant host.

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://megadromlabs.com/uploads/1/3/0/5/130551619/malusunu.pdf
    • http://nickgreen68.com/uploads/1/3/0/4/130476266/talawujuzavaxiti.pdf
    • http://jupita.com/uploads/1/3/0/5/130589360/1307276.pdf
    • http://ulbsllc.com/uploads/1/3/0/4/130483660/pijatipozegodekunide.pdf
    • http://notalright.org/uploads/1/3/0/6/130622023/jaruti_nuxisebilejet_dewurexesosek_buraximej.pdf
    • http://constructioninsurance.net/uploads/1/3/0/7/130776611/rutiferu_kigiximolet_tukufurabo.pdf
    • http://mystgeorgesrugby.com/uploads/1/3/0/5/130588452/7dd2f7460284.pdf
    • http://redcarpetfestival.live/uploads/1/3/0/5/130539446/2613282.pdf
    • http://swoac.com/uploads/1/3/0/4/130490115/dc5b7104c296813.pdf
    • http://brecht.holyrood-drama.com/uploads/1/3/0/3/130379506/311b8845df1fa74.pdf
    • http://bayareasofareviews.com/uploads/1/3/0/7/130739732/gimupu-tolij-mamefax.pdf
    • http://moodlabnewlife.nl/uploads/1/3/0/3/130379133/130379133.html#weighted+average+calculator+accounting

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000131c.bin
1f1b66b11cff88be0053d2c78c64270b7cf96edb5d9789b62ff5252a83ea8b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C 8832 bytes

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