Malicious PDF — malware analysis report

Static analysis result for SHA-256 8919d1dbb201eab1…

MALICIOUS

PDF

37.4 KB Authoring application: Inkscape First seen: 2021-08-25
MD5: a6542bfd33978604d0a63dbbce31dc1b SHA-1: 5346534865e75b57b92055108e21dee19e876e93 SHA-256: 8919d1dbb201eab16729abc4dc04595e2a5d3e0b366f461249d8e9ce85cbef61
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to other PDF documents. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for SEO spam or phishing purposes. The embedded URLs are the primary indicators of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://codemonster.com/uploads/1/3/0/7/130738936/rutepu.pdf In PDF document text
    • http://mybabybubulah.com/uploads/1/3/0/6/130621686/senipobawaliju.pdfIn PDF document text
    • http://intellectindustry.com/uploads/1/3/0/3/130379237/xokalitujoripa-medavuf-fivaz.pdfIn PDF document text
    • http://jayatirta.com/uploads/1/3/0/2/130270742/4658908.pdfIn PDF document text
    • http://phivosstavrou.com/uploads/1/3/0/7/130739542/929e292e7e929c1.pdfIn PDF document text
    • http://atlantabasementwaterproofingco.com/uploads/1/3/0/7/130740222/vovuzolijuk_zixasakibo.pdfIn PDF document text
    • http://primenailsandbeauty.com/uploads/1/3/0/7/130775031/e543ebbccb6554.pdfIn PDF document text
    • http://dancefusioncc.com/uploads/1/3/0/4/130477952/1451755.pdfIn PDF document text
    • http://treasureblitz.com/uploads/1/3/0/2/130274338/gatedati-rujobikafufavi-zezosojig-bareg.pdfIn PDF document text
    • http://popuppads.com/uploads/1/3/0/6/130620248/25c5410.pdfIn PDF document text
    • http://stayhererentals.com/uploads/1/3/0/8/130814397/7891004.pdfIn PDF document text
    • http://www.ampenergydrink.org/uploads/1/3/0/4/130477228/guxelaj.pdfIn PDF document text
    • http://polarclad.com.au/uploads/1/3/0/5/130550929/gibamow.pdfIn PDF document text
    • http://babyphotons.com/uploads/1/3/0/5/130551567/miguzuta_derorutonara_vanebudunef_bobik.pdfIn PDF document text
    • http://egyptcasting.com/uploads/1/3/0/7/130776331/bapanewifexafogurom.pdfIn PDF document text
    • http://laneyguesthouse.com/uploads/1/3/0/6/130603989/7397544.pdfIn PDF document text
    • http://ellewells.com/uploads/1/3/0/4/130488398/130488398.html#steel+l+angle+weight+calculatorIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36A9 7976 bytes
SHA-256: b1a3e860c281e50b8c4407d690609a36df00c3cabaec912faaee5c49479de0a0

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