Malicious PDF — malware analysis report

Static analysis result for SHA-256 b83b994519968f35…

MALICIOUS

PDF

36.4 KB Authoring application: PDF Studio
MD5: adc881b6b930bfa3062e3eb1f742f9e9 SHA-1: 85e01ff2ca90e08951ea513e750edd393a3fd469 SHA-256: b83b994519968f3582bf81c164e299fcd232d2ddec8e6a22c84b61bca9e323de
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The PDF_SEO_LINK_FARM heuristic indicates the presence of 19 external links, with the first being http://mcgrainz.com/uploads/1/3/0/5/130541131/585eda43ad4d2.pdf. This suggests the document's primary purpose is to redirect users to potentially harmful content, likely for phishing or malware distribution.

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://mcgrainz.com/uploads/1/3/0/5/130541131/585eda43ad4d2.pdf
    • http://nataliadgrafica.com/uploads/1/3/0/6/130603919/37c71.pdf
    • http://desatascosterrassa.com/uploads/1/3/0/2/130271250/2562246.pdf
    • http://steveslawnmowersales.com/uploads/1/3/0/7/130776266/4718182.pdf
    • http://whirlwindprofessional.org.uk/uploads/1/3/0/5/130590177/jimuboje.pdf
    • http://spectrarte.com/uploads/1/3/0/6/130620626/sunekutopi-lamarev.pdf
    • http://grumpysgreen.com/uploads/1/3/0/5/130589014/mibopijuvuban-vetunaxuw-bezuregivewix.pdf
    • http://thebaldwinfamily.com/uploads/1/3/0/7/130776599/kezif_nofubazajonovuv_sigaxetolawik_pelodu.pdf
    • http://modernbyken.com/uploads/1/3/0/6/130640066/naviv.pdf
    • http://www.mavenmagz.com/uploads/1/3/0/4/130436289/2972538.pdf
    • http://whatijustsay.com/uploads/1/3/0/5/130551777/6173812.pdf
    • http://hairbyjonathan.com/uploads/1/3/0/4/130490399/84409fe27c7.pdf
    • http://chippenhampositiveliving.com/uploads/1/3/0/2/130270963/7366980.pdf
    • http://pitchtreemetalworks.com/uploads/1/3/0/2/130289163/715a09689e9.pdf
    • http://nilu-shailen.com/uploads/1/3/0/6/130621780/863851.pdf
    • http://ifuckinglovecats.com/uploads/1/3/0/7/130739640/4236266.pdf
    • http://infiniteproperties.org/uploads/1/3/0/7/130776433/kugep-mijirefavof.pdf
    • http://smithscateringholbrook.com/uploads/1/3/0/6/130639669/saxukudutubek.pdf
    • http://mail.centralindianaiscebs.org/uploads/1/3/0/9/130969607/lowuvipak.pdf
    • http://www.minute-memories.com/uploads/1/3/0/5/130544539/130544539.html#contoh+kasus+askep+autisme+pada+anak

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003154.bin
9b8d43e6140731abe4338815ff84d4b6a915de5ebc1423e4dc8ac5866c12f78e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3154 7296 bytes

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