Malicious PDF — malware analysis report

Static analysis result for SHA-256 358d81429df49680…

MALICIOUS

PDF

38.9 KB Authoring application: GIMP
MD5: 081f4339b14ee37d3120f405433fdaa2 SHA-1: 695d654378d5e7b3dd9824774a4e6401dd2203de SHA-256: 358d81429df496803564cb1ad22e27dd48f71ecbe845c470a4e823622255c9a9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This is indicative of a link farm or redirection scheme, likely intended to lead users to malicious content or phishing pages. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://rangakvernberg.com/uploads/1/3/0/4/130476412/kuvonikumi.pdf
    • http://beyogaonline.com/uploads/1/3/0/4/130489523/3804282.pdf
    • http://kyleclowns.com/uploads/1/3/0/4/130476493/331801.pdf
    • http://student-teaching.us/uploads/1/3/0/5/130540208/d94609275470.pdf
    • http://divinewillschool.com/uploads/1/3/0/4/130490106/36eccb8.pdf
    • http://myownbank.co.uk/uploads/1/3/0/5/130550803/2258705.pdf
    • http://gopog.maliei.xyz/uploads/2020/01/28/ziwonabe-rumikete.pdf
    • http://mommasnow.com/uploads/1/3/0/5/130590168/7282916.pdf
    • http://novelsf.com/uploads/1/3/0/2/130289736/130289736.html#heathers+beautiful+sheet+music

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001076.bin
245249e8efc832197e4b9740b979b5abcd5e332317cc101475dfd696a8ff6e49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1076 8184 bytes
font_01_sfnt_off00005386.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5386 16068 bytes

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