Malicious PDF — malware analysis report

Static analysis result for SHA-256 022bd52cf8b09a98…

MALICIOUS

PDF

35.0 KB Authoring application: pdf-parser
MD5: 60ef86fcb976ac4a57d092af74c50f95 SHA-1: d65381a82e3c687df52281c8a0440c98cb3e8ad1 SHA-256: 022bd52cf8b09a98fc6f5c4f9ff282fbdfc96ea070a9d7e6b67e63b771f0e5a7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and an ML classifier also flagged it as malicious. The embedded URLs are the primary indicators of malicious intent.

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://gardenofedenmke.com/uploads/1/3/0/6/130605253/junimazo_darimanomusugip_loxudagivi_nitem.pdf
    • http://coachingkits.co/uploads/1/3/0/7/130774977/3820559.pdf
    • http://drinkresponsively.net/uploads/1/3/0/2/130272579/kifeguxeti.pdf
    • http://hiveplanner.com/uploads/1/3/0/5/130541552/a1c712e3460522a.pdf
    • http://wethenorthshirts.com/uploads/1/3/0/5/130541624/ed0f37.pdf
    • http://superjalan.com/uploads/1/3/0/7/130776734/debamomipiwir.pdf
    • http://terrapowersystems.net/uploads/1/3/0/6/130620669/e4fcbbe.pdf
    • http://www.lexmarch.ca/uploads/1/3/0/6/130604269/wojidoradiwiv.pdf
    • http://www.serviciolatinodeprensa.com/uploads/1/3/0/6/130639521/fanipeneworupuse.pdf
    • http://larsonpastels.com/uploads/1/3/0/7/130738859/2bacbda7bebafbc.pdf
    • http://huanjiangpindeqipaiyouxi.br3h.com/uploads/1/3/0/7/130776225/130776225.html#normality+assumption+linear+regression+model

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031cf.bin
7ba9b0eb89fcb8676a0ad0243c94356413feb8a009406ee5943fc8d2d0c8f8ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31CF 8352 bytes

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